Here's what I think about each one...and you can make your own judgement.
England:
Quite arguably the best theming in the entire park, but it could be so much more than just the bottleneck area in and out of the park. Shopping there is good, but w/a lack of any attractions other than Pirates 4-D, it's just an area to pass through, really. The food could be better, but at least they sell fish and chips and the area behind the candy store where you can sit and eat by the lockers is very scenic. They could easily put in a sit-down restaurant here, but they won't.
Scotland:
As far as rides go, it's hard to beat a classic like Nessie. But what else would you expect to see from a place like Scotland? They don't have iconic buildings and architecture, so to me, the theming is pretty decent. And don't ever get me started on the lack of Scottish dining options. You don't WANT it. Trust me. Pigs in a Kilt is plenty enough. The horses & sheep do give it *enough* of a Scottish feel without going over the top. Plus, it's the first place you can go to to take the skyride and the train. +1 for me on that.
Ireland:
This is where a retheming of an old hamlet worked. It actually does feel more like Ireland than Medieval England of old. Food is excellent. Shows are excellent. A few misses include EitA, and what on Earth is up with that talking tree thing? Where are the Leprechauns? BGW should hire some people of, ah, short stature for this area. Don't get me wrong...I'm not saying they should go around asking people "WHERE'S ME LUCKY CHARMS??" But don't tell me whenever you think of Ireland, you don't think of Leprechauns...They need some.
Wildlife Reserve:
This area to me lost it's charm when they got rid of Threadneedle Faire. The wolf preserve is a waste of space, imho. Didn't that area used to be the Bald Eagle area? I guess that fit in with the AB logo back then, but the wolf preserve does absolutely nothing for me. The only thing I detest is pushing a stroller with two kids in it up that hill. I'd rather walk around the entire park with that stroller thru Germany, Oktoberfest & Italy to get back to England than have to traverse that hill all day. The Lorikeet Glen is the highlight of the area though. Kids & adults of all ages LOVE those friendly birdies.
France:
Nowadays, it's pretty much just a hamlet to have to walk through on your way to something else rather than a place to stop for a while. Sure, it's got Griffon & having just ridden it for the first time the other day, it's one bada$$ ride, but once again, don't even get me started on the lack of dining options there. This hamlet deserves better treatment than it's currently getting. I almost feel bad for the people that have to work there.
New France:
One of the best places to eat at the park is here w/Trappers. Definitely dig the rustic nature of the hamlet, but at the same time...We're talking about Canada, not Europe.
Rheinfield:
Merely a transitional hamlet on the way to Germany. At least it's got Alpengeist and that nice covered bridge that's nice to stand under while you wait for the rain to pass over, or to watch the Alpengeist coaster scream by.
Oktoberfest/Germany:
Clearly this is the centerpiece of the entire park. I cannot sing enough praises for Festhaus. (Entwined show, excepted) Even my own kids can't stand that show....Great food everywhere. Games everywhere. Rides everywhere. And AIR CONDITIONING w/the Festhaus. Only place in the park you can eat in a climate controlled setting. (Yes I know they have a small area in Grogan's Grill, but not for 2,000 people) And being of German descent, there's nothing like a plate of sausages, sauerkraut, red cabbage, potatoes & a glass of beer to have while I'm spending a small fortune.
San Marcos/Italy:
Good shopping & eating. The bridge from Oktoberfest to here is VERY scenic. But the outdoor eating facility is absolutely BRUTAL on the senses when it's really hot/humid outside. The fans don't help all that much. And the "Italian" food could be FAR better than it is. But hey, it's a theme park. Can't expect it to be THAT great, but still.....where's the LASAGNA, BG???
Da Vinci's Garden:
This area is fun, especially since there are a LOT of rides the kids can go on w/o much waiting time. My only complaint is there is practically ZERO shade in this area. On a hot sunny day, I tend to just walk through here or go back to San Marcos.
Festa:
This is about as close as BG gets to resembling Kings Dominion. Zero theming. Lots of places to spend money on crap you don't need. But my biggest complaint about this area is that it's the equivalent of a theme park cul-de-sac. Only one way in or out of this area makes it a traffic nightmare, especially on a busy day if you're pushing a stroller around. Teenagers love it for all the rides and I have only been there pretty much just to get on the train back to New France. La Cucina's AYCE buffet is the only redeeming grace, food-wise. The rest is just a bunch of concession stands.
Forest of Fun:
To be honest, my enjoyment of this area is mixed. I was here both on extremely busy days & dead days....If you have really small children, being here on a busy day is unbelievably exhausting & irritating. I love my kids, but I really can't stand how other parents don't "watch" their kids. The queues for the rides can be ridiculously long & there are very few places to actually sit & relax while the kids play in the water area. On slow days, however, this place is WONDERFUL! For parents like me, you're not constantly dodging traffic, or spending 10 minutes on a place to park your similarly looking stroller next to someone elses....and where the heck are all the bathrooms in this area?? You'd think they'd have 3x the number of bathrooms compared to any other place in this park. Kids have the most notorious ability to have to use the potty and they can't "hold it" like adults can.
So there you have it. As spoken by a 38 year old father of six. (Yes, six. And the reason I have six is because I DO NOT WANT SEVEN!)