After a bit more thought, I gotta say, I'm not one for keeping a gun 10 years. I can't think of anything I have, powder-burners or air, that I've had for more than... sheesh... maybe 5 years tops. I love trying new things, and if it sits on the shelf too long, it's up for sale.
I have a table full of fun, most of them I'd sell in a heart-beat. Maybe I'd keep long-term the Diana 34 and big brother 350mag. I like the Walther Parrus, and it has a fine suppression on it. Yeah, pretty much anything else I have will eventually show up for sale somewhere.
pdxFrank,
I'm the opposite of you I tend to get attached to things especially guns. I have guns that I've been using now for over 30 years and would never sell them. Each one is a treasure full of great memories.
The important thing is that we have these choices and that we each do what we want.