I'm not sure why you think of me as a "proper translator." I'm a complete amateur, and this is just a hobby for me. I enjoy it to be sure, but the only reason I get to translate "cool" stuff is because I don't get paid, so I can translate whatever I want, taking as long as I want. I realize most professional translators have to work with boring stuff like technical manuals.
I felt like such a fraud when I went to Japan and realized how little of the language I actually knew. I'm sure if I applied myself I could get much better, but doing something like that would basically require a career change. It's something I've considered though. At the same time, it's hard to imagine earning the same kind of money translating that I'm earning right now. I've reached that "specialization" stage you talked about with my current day job, to the point where I'm basically indispensable to my employers.
As for the whole kids thing, your description of yourself basically sounds like me. I know I don't want kids now. I just wonder if I'll ever want them. I'd hate to get snipped and then regret it in 5 or 10 years. But I'd also hate to not get snipped and then end up stuck with a kid.
Life advice thread!