Lots of things are attractive to me in other people.
If I'm just going to have a crush on someone, then looks and maybe even a nice personality are about all that's important.
If I was to consider dating that person, then personality and at least some degree of looks would be a must, as would a sense of humour, an honest heart, intelligence etc.
If it was a friend, all I really need is openness and trust.
Really, though, there is nothing I actually consciously look for in anyone, I just take them the way they are, and either like them or don't. I usually manage to get on well with and really like most people, though, so I guess I'm lucky that way. :D