Good to have you on the forums, G27. I, too own one handgun: a GLOCK 27 in .40S&W, with Heinie Straight Eight sights, Handall grip, and Pearce +1 Mag Grip Extentions.
I CC only, as I don't yet own a holster. I "technically" carry Mexican, but IWB/SOB and with palm-in draw. By doing that, the ejection port positively engages my belt, which I make a notch tighter than I would normally wear it without carrying. I've gone running with it like that and also biking and had no issue with it coming up/out or falling down my pants; stayed right where I left it. It's also comfortable when I drive around in my car and in the heat we've been having in Seattle lately.
If ever someone wants to bash you for owning a GLOCK, point them here: Glock 21 Torture Test - Theprepared.com
I really hope you're able to join us for the Open Carry Picnic/BBQ/Lunch in Tacoma at Firemans Park on July 21st. Since you've been reading the forum for a while now, I'm sure you're aware of the thread regarding us meeting up on the third Saturday of the month for lunch. I've only been to one, but it was fun to meet the other gents on here (and their lady-friends *tips hat*).