Funny how that works.... As a kid, couldn't wait to get a BB gun. Then a pellet rifle, then a .22. After that, centerfire rifle and shotgun and handguns. Now some 50+ years later, right back to the ol' .22 and Air Rifles. Personally, I just enjoy it more than shooting my centerfire handguns, or rifles.
Ruger Mark IV 22/45 Lite
Browning Buck Mark 5.5 Field
Ruger 10-22 (well, what's left of the original)
M&P 15-22
Ruger 77/22 WMR (with Green Mountain SS Fluted .17 HMR .920 barrel)
Air Arms Pro Sport .177