the default texture looks good already, but if it's animated, it's even better so.. Blocksmith Hybrid animated default texture pack
Its not really a texture pack, but I use vanilla tweaks. Its a site where you can get all kinds of handy stuff (low fire, transparent shields and more) and it gets combined in one texture pack and I love it
Dandelion. and then Willpack. I love the color themes in both. Oh and Dragon Dance. That's my absolute favorite. It's for 1.7.4 but it's beautiful.