Thanks for helping to beat me to the punch on the photos.
I like both the G19 (my current one is a 19C) and the USPc9. I got such a good deal on both they had to enter the stable.
The only drawbacks to the USPc9 IMHO are:
-Mediocre to poor trigger
-13 round capacity on 9mm (I'm a 9mm fan)
-Different placement/action on the mag release, although it's pretty good
You can do a chamber check or charge the weapon while it's on safe, though, which is a nice feature.
The Glock, in comparison, has a better axis (as mentioned) but the mag release is difficult to operate in my hands compared to an XD, CZ, etc. Also, I find the need to swap out the slide release with the extended ones. I do like having 15 rounds in the mag, though.
I think you hit upon a very important issue - it felt good in your hand. I have a friend who can't shoot Glocks because the sight picture is off due to the grip angle. No matter how "great" they are, he just can't shoot them.
Good luck, keep us posted.