I use version v3, as it's what I assume the majority use and since flash sigs can't do transparency without HTML I have to have my sig background colored to match the majority's skin. And from what I've heard, you're not the only one who dislikes the current skin, many feel the same. Personally? I didn't care for it at first, but then it grew on me.
I don't like the Lite skin. It's too bright to my taste.
I could do with the Classic, but almost all the new features we design are meant for the V3 skin. If we had to do them for all 3 skins, it would be three times the work which is nearly impossible for one single man (yes, I'm a man.)
So I use v3, which I find sooooo much better than the other two. Much more beautiful, the colours are so well balanced, it's easy on the eye, all the features are there... The GBAtemp v3 is the best IPB skin I've ever seen, TBH. But I guess I haven't seen a lot.
I use v3... and I think it looks good because it's a bit darker... easier on the eyes.
I would've used the classic skin if it had all the most recent features, and if it were a little darker (sine I liked that old one