I'm 29, so just behind you in age. I took many, many things apart as a kid, but really I didn't understand any of it or manage to fix things.
I've had several careers since then, mostly computer programming, web programming and IT support, since then joinery, furniture making and sign carving. Currently working as a maintenance worker doing varied tasks: steel fabrication, gardening, delivery, etc. You could say my hobby is learning and collecting skills.
I started again with electronics more seriously about 5 months ago, and desperately trying to learn transistor action, opamps, linear supplier, switching supplies etc. I have been building a lab gradually: Fluke 87V, Kikusui 20MHz dual-trace scope, Farnell dual 30V 2A power supply, and a couple of lesser spec'd home made power supplies.
I'm interested in power supplies, chargers, off-grid systems, dual car battery systems. I also have interest in audio amplifiers and guitar effects units. Valve amps are in my future, but I don't really know enough of the basics yet.
Next DIY project is an ESR meter, to help find dead caps.
Next big purchase is an LCR meter (to make coils for home made switcher supplies), a variac would be good too, and also a hakko fx-888 or similar.
Next to learn: so much!!
Cheers,
electronwaster