Life with a teenager has its ups and downs but can be great fun - or at least, that's my experience so far. I've two boys, now 26 and 21. We had our run ins, especially with the older one, the usual stuff, drinking, staying out late, not working at school. But hey, he's now got an MBA, a job with the Scottish Parliament and a lovely girlfriend, so it all worked out.
Second son was easier, he wasn't such a party animal as DS1. He went to work in India for 6 mths when he was 18 and that matured him immensely. He's currently at uni. studying psychology, sociology and french.
My older daughter is almost 14 and hasn't given us any grief yet.(!) She's very easy going. She tries to strop occasionally but can only manage about two minutes before laughing.
The 5 yo daughter is a horror now, so I'm not looking forward to her teenage years. But I can always threaten to send her to stay with big brother, who is far stricter than I am!!!
The biggest bone of contention in the house with the boys was the state of their rooms. But I know now it just isn't worth sweating over. They do clear it up eventually, after about 5 yrs of squalor.
I've loved it as my children have matured. Its so great to be able to talk to them (and their friends) about all sorts of things. They shed new light on old subjects and they have a wonderful sense of humour.