I am 40, but have the perfect excuse for still collecting. I'm a dad with an 8-year-old son. So there's no collecting carded figures for display. But I do still get to enjoy shopping for figures and searching for them online.
I handed down all of my vintage Star Wars and Secret Wars (Marvel) toys to my son. Nothing really expensive in those lots, so it's okay for him to play with them. I have also bought him a bunch of Narnia figures (not happy with the quality of those), and Indiana Jones figures, playsets, vehicles, etc. Fun stuff.
Kept a few for myself for little displays in my office at work. The Indy figures go well with artifacts I've collected on my travels (statues and carvings, masks, Egyptian funerary cones, drums, crosses, and so on).