I have several teens, and have adopted several more [As in, there are over a hundred teenagers that feel comfortable in my house.]
It is awesome. Teenagers are the best age group there is.
I highly suggest that people take a book or two on parenting and seriously adopt what they have to say. Raise your kids from a young age on the premise that you want to have a relationship that will last till you die.
(In my experience, the best book I've read is "Raise your children without raising your voice".)
Set aside time and effort to make the relationship work for real. This is an investment and will not invest itself.
Religion is important, family is important, cellphone use should be filtered and limited in a matter-of-fact way from when they are first getting a cellphone. [OK, phones are a big deal to get right, but this is not a blog.]
The result is relationships with your own kids that have unbounded energy, talent, resources, interest, etc. - that are just going out on their own to explore the world and conquer it.
Well, well, worth the investment.