all of the above.
As long as their profile is clear of what I consider 'red flags' I add them. Red flags would be like an obvious obsession, or hatred with rage. I'm also leery of 'flowery speech' showing a sense of spiritual superiority.
interesting profile stories and friends
Their interests, for starters.
see if they have interests in common with me and reject those with nude avatars even if they have enough experiences in common!
I haven't gotten that far yet, but definitely look for red flags, you'll feel it in your gut.x
That we spoke previously and we would continue to keep speaking...hah
make me laugh
I go for the add to circle button.
I've only added one of the people on my list. And that was for personality :P