Unearthed Arcana?

We using UA? I picked up a copy of it a couple weeks ago... being a Drow sounds cool, but I haven't really looked into what else is in the book. Any particular rules/classes/items we're allowed from this book?

I'm still thinking over what I'd like to play in the next game. Drow Thief? Half-Elf Fighter/Cleric of Cthulhu? Dwarven Fighter/Thief? Just kinda thinking aloud.