I had a G21 back in the late 90's and really liked it...I ended up trading it for a Browning BLR 243 and later regretted the move. I have been shooting mainly 1911 pistols and single actions, well I should say I prefer them. I have had a Karr, SR9, P3AT, Ruger P345 (I think), and a few others along the way. I was never very accurate with anything other than the Glock and a true single action, and never liked the Double/single action autos.
So when I decided it was time to add a high capacity 45 to the collection it was a G21 of course. I tend to lean in the direction of metal guns because of the look and feel, but you cant argue with results