Oh, DEFINITELY Reshiram and Zekrom. =/ I never liked Dialga and Palkia. Their designs just aren't interesting, and I never really acknowledged them... And Palkia doesn't look anything like a Water type (even though the reasoning for it makes sense >.>). And besides, Time and Space isn't as interesting as Yin and Yang. Reshiram and Zekrom actually look a LOT different from one another. Reshiram looks more natural, and Zekrom, more mechanical. And their typings are much more interesting (well... Dragon/Electric at least x3). So Reshiram and Zekrom for me. :B