Let me just begin by saying I like Adam West, but...no. His suit's not even an option to me. I'm really torn over Michael Keaton's suit...I grew up with it, and it just screams Batman to me. I'm not a fan of "Burton's gothic touch", but the cowl has an almost organic air in how it connects with his cape, and the muscle definition definitely suggests that Batman isn't taking any backtalk (which he wasn't, in the '89 movie). The utility belt just looks dated, though. Too bland and too accentuated in color for my eyes to miss. But considering what was done with it in the movie, it's still high up there for me.
The suit Keaton wore for Batman Returns didn't do it for me in comparison. I have no clue why they went for a chinuous look to his abs, and whereas the last suit (while somewhat gaudy) maintained the air of muscular definition this one just looks too one-dimensional. The utility belt is an improvement, but that's about the only thing upped. The blue tones are less noticeable in the final cut (good to me), but whereas Batman's look in the first film looked bat-inspired this just looked like they went more for mechanical style than gothic substance. In the end, it just looked like Keaton in a suit. Not quite as menacing as the first.
Kilmer's suit is a big source of confliction to me. On one hand, the nipples make no sense. Even if you're taking the anatomical angle, there's no reason. The muscles were there in Keaton's suit because he didn't actually have them. Trying to validate the nipples by saying "it's a part of the human body" would mean that he needs some mold to show us his unmentionables, and that's almost as unnecessary. I can see why people are still offended over it. I also don't quite like the belt- nice luster, but too low-riding and too bulky. The gauntlets look like crud. On the plus side? I like the cowl- it doesn't diss the first film, yet it doesn't look like the endless Neck of Doom BR brought to the table. There's a nice division between the cowl and the rest of his cape without looking like Superman, and his bat emblem's luster is a bit more to my liking if the emblem had to be yellow. His muscles aren't bad either, though they bring me to the aformentioned addition that is his mammary glands. The Sonar Suit wasn't bad at all. It just needed some smoothing out, and it could have been a nice sequel suit.
...Then we have the Batman & Robin's rendition on Clooney. It's not nearly as bad as West's, but it's also second worse. The suit feels like they saw Batman Returns, tried to copy its look, and failed. The cape is now way too detached for my liking from his neck, the emblem is too raised even though it gets rid of the gold/ yellow look and the scallops are just in a disarray. Clooney's suit also had way too many blue hues for me. The gimmick suit he had on was even worse. White on Batman, even as a gimmick, isn't good at all for his character. There are better ways to signify a cold-resistant suit than just putting chrome grey and ridges all over.
The Begins suit really did it for me. It brought back the nostalgia of the Burton suit with it's rubber exterior without looking silly. The artificial abs look just fine to me, as Bale powerfully added a thickness behind it. Granted, the gauntlets have sort of a messy contrast from the suit. But for storyline purposes it made sense. The chest seems like body armor (which it was in the film), giving him a prepared look for a modern age. The emblem rocks...period. The cowl could do with some work, but the cape drapes over his shoulders perfectly. Heck, this suit even makes the low-rise belt work, and gives it a workman's appearance to add to that heightened realism. Overall, this was a finely-made suit.
The Dark Knight is where it's at, though. The chain mail harkens back to the comic bookish West suit without being silly in the least, and fixes the issue of the armor's bulkiness by segmenting things and making movement more practical. Does it make him lose his presence without the stiff look? A little, but then I look at the retractable scallops and find myself back in my comfort zone. Though I initially didn't like the biker look to his helmet it's grown on me, and now that the segmented neck is clear I can confidently say I like it. The rubber straps make it feel like he's armoring himself in a way a real knight of the round would have done back in the day, and don't conflict with the chain mail's space. The cape and emblem are done to my liking, and even though the belt is precariously low it doesn't detract from the final product.
Overall, my final scores:
Adam West's Batman suit: omitted
Michael Keaton's Batman suit: 8 out of 10
Michael Keaton's Batman Returns suit: 7 out of 10
Val Kilmer's Batman Forever suit: 7 out of 10
[The Sonar Suit]: 8 out of 10
George Clooney's Batman & Robin suit: 6 out of 10
[That Thing From Hell He Wore]: 5 out of 10
Christian Bale's Batman Begins suit: 8 out of 10
Christian Bale's The Dark Knight suit: 9 out of 10
Side note: It's a funny thing...people say on the threads that they revile TDK's suit, yet this poll has it ahead of 6 out of 7 possible options by 60%.