I grew up working on a 1964 Ford F100 out of necessity. It was satisfying but I always had to hurry up and get it done as I was without transportation until I fixed it (and it broke quite a bit). I do basic maintenance on my trucks now, but I hate when stuff breaks down. Of course, I have never had a strictly 'play' vehicle such that I can afford to let it sit until I can get to it if it breaks.
I just inherited a 2001 Yamaha Big Bear quad that needs some work. That may scractch the wrenching itch for just a bit. I just hate having a car broken, I know what's wrong, and I even could possibly fix it but I don't have the mega computer needed to reset everything. Thanks to all for the advice so far.
