Ahhh the nostalgia; the 19 was the first to pop my glock cherry. You should love it! It is a perfect balance of compactness, capacity, and ruggedness. Ever since the 19, I have been addicted to Glocks. Next was the 34, 27, 31, and now the 21. The 34 and 31 are fricken laserbeams, accurate as heck. I have not shot the 21, so I can't comment on it. I definately recommend you order some pre-bans for it, if you don't already have some. Check out ivanhoeoutlet.com for nfml mags at $59 bucks, a good price for pre-bans.
Good luck with the 19!
Good luck with the 19!