I bought an XDs45 over a G36. Both are good guns, the XDs is superior for my tastes. I like the slimmer frame, the trigger, and grip safety. The G36 is fine, but I don't love the mechanical feeling trigger. And Glock's grip always leaves me having to really push that front sight down. Just unnatural for me.
I also have a G27. It shoots fine. It sits at home, alone, and hasn't been shot in probably a year. I'll likely move it along at some point, but no rush...it's still a perfectly good gun.
When folks ask me why I don't love Glock-- the simple answer is that they feel about as natural as shaking hands with a robot. They're just a little 'off' if you shoot a variety of pistols. They work great. Price is fair. Aftermarket options are outstanding. This is why some folks (including many Glock owners) will state that you should go all-Glock or no-Glock.
Obviously, I haven't heeded that advice. I greatly value the versatility of my G23/32.