Well, my number one favorite is luxray as you can probably tell by my icon. ^^
I also like garchomp, lucario, gallade (looking forward to using mega gallade ^^), gardevoir, braviary, zoroark, floatzel, mightyena, liepard, all the eeveelutions, staraptor, sceptile, marshtomp (recently became a fan), and a few more. BTW, I list them by their final evolution. I do like many of the pre-evolutions. Shinx is so cute. ^^