Often. He might think he has a better chance to score with her than the girls he wants to date.
You cannot really gauge a man's interest other than on a day-to-day basis (if he talks to you that day, he is interested that day). Therefore, it does no good to try to guess what the future will hold.
If a guy keeps going for a girl then he most likely finds her attractive but I guess there may be exceptions.
Attractive girls are nice.
But nothing satisfies like a sure thing.
Depends on how desperate he is.
Hmm, depends on the guy. I know that I would not pursue a girl that I found unattractive. That said, I love talking to and meeting new people so that would not stop me from talking to her.
depends on how "unattractive" he finds her
A guy would not purse a girl he thought was unattractive. Maybe from a bet, but that just happened in an romantic comedy!
What makes a guy approach a girl, I would say simply interest, definitely interest.
it also maybe because he is seeing past the physical looks and likes the person for who they are, I know that's not always the case but there are plenty that do. :)