I have no problem with your opinion. But the OP is asking for help. Simply telling him "vista sucks" helps nobody. If you want to avoid flame wars, try and back up your statements. That's a lot more helpful.
I do agree that Vista was way overdue. UAC can be disabled if it bothers you (although at work, you probably don't have the rights to disable it). The lack of drivers is no longer an issue. If you find it an issue with you, then you're probably using some off brand POS peripheral. Heck, Vista came with drivers for my Canon i470D printer, which is nice. I have personally run into software compatability with Solidworks (which is the reason why I had XP on my MBP, but oddly enough, Solidworks ran like crap on XP on my MBP as well). For games, I haven't had any issues personally.
Transfer speeds are indeed crap with Pre-SP1 Vista. SP1 fixes the transfer speeds, and there are hotfixes available for Pre-SP1 Vista. SP1 should be out to the general public this month or next month at the latest.
And on Stability, I have found that Vista is a hell of a lot more stable than XP. In the year and a half of using Vista, I have yet to get a BSOD. Well, that's not true. I got a BSOD while OCing my processor, but the BSOD was my fault, and is something you wouldn't get on your MBP (you can't OC the MBP's CPU). I also got a BSOD while using early beta-software, but that's what you get when you use stuff that's full of bugs. I haven't had any BSODs that was caused by Vista. Also, Vista's driver model allows for a driver that becomes unstable to be less likely to NOT crash the OS, like it would in XP. Instead, the driver is unloaded from the OS and an error message pops up telling you that "such and such has stopped working", and the most that may happen is it will crash the program. I find that a large improvement over XP.
Onto the versions. I don't see how this makes an OS "crap," but it's your opinion.
Vista Basic is basically for older computers. It needs less RAM compared to other versions. Vista Home Premium is directed at home users. In all honesty, Home Premium is everything that the average consumer needs/wants in an OS. It has the Media Center functionality, Aero, and other small stuff. Vista Business is aimed at, well... Businesses. The home user has really no need for it. That's the version I'm using, since it didn't cost me a dime. Vista Enterprise isn't available to consumers, only to Volume License customers. Vista Ulimate has everything. I honestly think it's a huge waste of money. The average user has no need for the business/Enterprise functionality, and the Vista Ultimate extras are a joke.
I respect your opinion on Vista, and I only refuted your claims to help the OP get another perspective, not to try and argue with you.