Out with the pointless baby evos, please. Even most of their Egg Moves, the only real point of them as they get different moves from their evolutions, are rubbish rendering them completely pointless. I agree that stuff like Snorlax hatching from an Egg seems stupid but you need those stupid Incenses in the first place. It's pre-evos such as Budew that get on my nerves.
Anyway, rant over.
I want a Fire/Ghost Ninetales evo. The Pokémon is based on Japanese Kitsune myths which are said to have ghostly characteristics, so I've thought for a while that Ninetales should evolve; it's only a decent Pokémon at the moment, but with a unique typing and an utterly badass ghost fox design it could become really popular :D .
I love my Houndoom but I'd like him to have better stats, so as long as they don't turn it into a stupid fat bulldog or something I'll accept an evo. Just a bigger, more crazy and vicious looking Houndoom would do it for me (Kinda how Primape is basically a big even madder Mankey with a few extra features like those bands round his wrists). As long as they keep the Dark/Fire typing too :P .
Things that have been around since Gen 1 but have never really been useful for anything, like Golduck - a decent HM slave at best - could do with evos too. Dewgong, Rapidash and Sandslash are just a few more old favourites that I'd love to see with a new appearence and higher stats :) .