I like the finger groove G19/23's
That said, I do have to undercut the trigger guard a bit to get the spacing right, otherwise the grooves don't quite line up right for my fingers.
On my gen 3 G21 I sanded the finger grooves off completely, undercut the guard, and radiused a couple edges to get it comfortable.
The good thing about Glocks is that they aren't overly expensive or rare, so it's not a big deal to modify them so that they work best for you.