I'm suprised more people don't use these:
DiMarzio Clip Lock straps. They truly are the shizzle...fo' sho'! They're long, comfortable and allow the instrument to slide when you want it to without dragging your shirt along for the ride. Easy to take off and the clips will NOT fail. Pricey, but definitely worth it when you have a valuable instrument on the ends of it.
Guitars: Squier Strat, Squier Telecaster, Warmoth Telecaster.
FX: MI Audio Blues Pro, Dunlop Jimi Hendrix Signature Wah, Sovtek Big Muff, Danelectro Fabtone Flanger.
Amp: Fender Hot Rod Deluxe