Evidently, I'm a very huggable person so I get them a lot from people even if I don't want them. I usually just go along with it though to make them happy (unless I really don't like the person). I like hugging my close friends but I'm hesitant to hug my mom and dad. I only hug them if they make me. Why? I dunno.
In general, I enjoy hugs. They're sort of like a gauge of how my relationships are fairing. If all is well, the hugs are tight and lengthy. When something is wrong, I know through a craptastic, half-assed hug from a friend. I remember when my first girlfriend broke up with me she was fervent about reverting back to being my best friend and keeping things not awkward. However, I noticed that she didn't put nearly as much effort into hugging me as she use to (even before we started dating) and it just felt...I don't know, fake. It told me things weren't okay between us even though we wanted it to be and I became even more uncomfortable around her.
I think I require some sort of physical contact to know that all is well.