The G19 is a persistent gun in my collection. I had a 2nd gen and an old 3rd gen before and I had sold both, and I hated myself about an hour after I sold the 3rd gen. Then I got another one (like new 3rd gen) and it has stayed ever since, and not going anywhere. I've also carried a G19 on and off over the years. I've carried a bunch of different guns over the years and by "days carried" there has been a G19 in the holster probably 60% of the time, which is more than all the others combined. It just carries well, even in the summer. I haven't carried it much recently but only because I've been lazy and I haven't set up my new G19 holster to fit the belt I have yet, so I've been a lazebag and used the G26 for awhile now. (which is a good little gun in its own right.)
I've also owned a ton of sigs. At one point I had a P226 9mm, a P239 9mm, 2 P229 .40s, two P228s (P228 is 9mm only), a P220, a P220-ST, a P239, and a P226 X-Five Competition. All of them are gone, and the only ones I sorta miss are the X5 and the Black P228 I had.
Sig does make a good gun (although their QC has fallen as of late, but that is a whole other topic by itself, I would have no hesitation trusting a lot of the used ones out there, though. ) but I kinda got sick of DA/SA, and in some cases, the long Sig SA reset, and I've found that the Glocks are also easier to carry because they are flatter and weigh less. The Glocks are also pretty easy to work on overall, although I have torn down Sigs as well. They are both good handguns, you just have to choose what works for you, ultimately. I just find its hard to hate a double stack 9mm Glock like the G19.
-Mike