Biggest regret, half my gear and my WE 1911. About 1/3 of my gear didn't work the way I thought they would and about 1/5 of my gear was crap. I've gone through 5 holsters for 2 of my pistols before finding 1 that works good. Went through 3 goggles (1 the strap broke, the other fogged up like a mofo). Got 2 chest rigs that just didn't work right for me, I'm now a molle convert. Busted 2 sets of knee and elbow pads. My WE1911, all pot metal and busted easily.
All this probably makes up for 1/4 of my whole airsoft budget, approximately $6k.
"Hey I'm the first one to say its a great country but its a straaaaange culture. This is a place where gun store owners are given a list of stolen credit cards but not a list of CRIMINALS and MANIACS. And now they're thinking of banning toy guns...AND THEY'RE GONNA KEEP THE F**KING REAL ONES!"
-George Carlin 1937 - 2008 (RIP buddy)