My “current” (and only) video game platform, the NES. Because nothing is as fun as Super Mario Bros 3 or Ducktales. (I rarely use the Power Glove or Zapper)
Why do I have a Batman mobile? Uh, the boss at the shop didn’t want it.
I really do not go in for much crude humor. But A: if someone offers you a sign from a bus, you take it. B: C’mon, #1? #2? On a -bathroom- door? That’s comedy gold!
I do not collect toys or statues. But darnit, my mantelpiece was so boring before. (Bat-Mite, Ace the Bat-Hound, Batman- TAS version, Robin, Nightwing, Blue Beetle, and the Blue Lantern)
A drawer solely for “fun” shirts. The dresser has eight drawers; might as well use one for colorful apparel.
Have you ever bought a PennyPress puzzle book in the grocery store? Seen the ads where they will ship you bulk amounts of puzzles for ~$20? Voila. Set for life.
If you do not have at least one Calvin & Hobbes book in your place, we cannot be friends. Deal-breaker.
Right next to my TV and DVD remotes is this. 24 years old; still works like a charm.
Yep, I have a fair selection of the critters. I use them for puppet shows. Wacky, whimsical, puppet shows.
Yes, I made my own bathmat as a kid. Yes, it has colorful dinosaurs. Yes, it keeps my feet warm.
...Of Course, this Could All Go Horribly Awry 
Embrace the child within (provided it is the spiritual child and not someone you have eaten).