I have 2 teens - a just turned 16 girl and a just turned 15 boy. Each child is different. We are a close family, but our daughter has always been very independent. She has always cherished solitary pursuits (reading, Karate, crafts) and does not enjoy hugs and cuddles. The hardest part of learning to parent her has been easing up and letting her come to me. I treat her like and adult, and in return, she is much more forthcoming about her life and what goes on. Yes, she spends lots of time on the computer (not in her room, though) and with her friends, but I always know where she is, and will drop everything when she comes home and wants to talk.
My son has always been a cuddle bunny. At 15, he was the only kid who got off the bus from a week long trip & gave his mom a kiss. This is just the way he is. He also spends a lot of time with his friends, but he usually arranges it so I take everyone home - that gives me a lot of time to hear all about what went on and what he thinks.
The best advice I have on raising teens is when they are ready to talk, GO WITH IT - no matter what else is going on. My kids know that I am always a willing listener.