Yes, though red haired people can often times be the target of bullying because of their distinct hair color, there are many people who admire red haired people for who they are.
The same reason anyone likes anyone else; they find whomever pleasant to be around. There is nothing wrong with liking someone with red hair; it's but a hair color.
No. It is not true that lice do not like red heads. There are rumors about it, but no. To prove it, I once had a friend who was a red head, and she had lice. Her name was Peyton Pendergrass
Though most mens favourite is either blondes or dark haired women there is still quite a few men in the world that prefer red heads. It varies from guy to guy.