I like Zekrom a WHOLE lot better than Reshiram. Reshiram's design seems cheap and bland, unlike Zekrom's, which is very detailed. I've also always though electric and dragon was a cool combination, and black was better than white (the colors, not the games).
I mean SHURE Zekroms cool when i first played White... But Reshiram kicks it butt even more then it kills Reshiram, plus Reshiram DOES NOT have any stab moves that Recoil!Zekrom all the way, though I wish he had more of a wing span... But Reshiram looks a little wierd to me, especialy that weird point below his belt ... Also I love the Electric/Dragon typing over the Fire/Dragon typing, though not to say fire/dragon isn't a bad typing.