It is a good, reliable gun. There’s nothing wrong with the firearm. The 9mm leaves much to be desired in terms of ballistic performance, but there’s nothing wrong with the Glock - they’re simple, reliable, etc. I don’t know that they’re a great carry gun unless you’re a pretty good sized guy - one of the sub-compact Glocks might be a better choice.
You can change the trigger pull on the early Glocks to a heavier trigger - the early 19’s have about a 5# pull. If you want a heavier trigger, there’s an 8 or 9# trigger connector bar you can install.
If you do choose to use a 9mm, get the best performance ammo you can for defensive carry.
Personally, if you’re in the market for a new carry piece, I’d look towards the compact .45’s. Again, there’s nothing wrong with the Glock 19, but there are better tools for the job now.
“Personally, if you’re in the market for a new carry piece, I’d look towards the compact .45’s. “
Unfortunately, many will have a hard time getting usable shot placement with compacts in a .45 unless they spend a lot of time on the range perfecting their grip. I think a medium caliber weapon loaded with self defense rounds is the best all around gun for the most people. Easier to carry, easier to conceal, easier to control. For the minority who find that can reliably handle a small frame .45 under stress, then I have no problem recommending it.