Ah back in the day....
My first airsoft gun EVER was a spring P22 from Sports Authority. Thing lasted forever, until my friend broke it, of course. Still, I bought a replacement I liked it so much.
My first AEG was an Echo 1 Stag-15 (M4). Great gun, had it for quite awhile. Worked in people's yards in the middle of the summer for DAYS to be able to afford it, as I was too young to get a real job at the time, but it was worth every minute.
Since then I've been through various AEGs and whatnot, but now I'm in the process of switching to all GBB. My most constant gun throughout my collection has been my KJW 1911. I'll never get rid of that thing, it's my baby... haha.