Depends on what you're looking for. My favorites are Painterly (a 16x16 highly customisable texture), Jolicraft (a stylized, awesome 16x pack), Gerudoku (a 32x rpg-themed pack), Dokucraft (the sequel i guess you'd say to gerudoku), John Smith's (32x realistic), Glimmar's Steampunk (32x 1800's science fiction) or adventure time craft or linecraft if i'm in a simple mood.
It is easy to know what is which when you first change the texture, and it is very organised
Or there's *cough* legend craft *cough*...
Google 'em, I'm too lazy to dig up links...
Most people here seems to adore anything that Doku touches.
http://www.minecraftforum.net/topic/117057-16x166★pixeludi-pack★-slimes-attack/
I love it :biggrin.gif: