Shield 45. Light, thin and 7+1 with the extension mag. I like the longer mag grip. Price is right, and shoots better than I thought it would for a small 45 pistol. I own and carry in a CYA clip on holster no issues. I still get good velocity with 185 grain underwood carry ammo.
Others I have shot/carried.
Springfield XDS 45 - killed my hand, trigger slap, etc Uncomfortable to shoot even target loads. At least for me it was.
3" 1911 - was not reliable, and physically heavy for a small gun.
Glock 30 - not bad, carried for a while, little bit too thick for all around carry. Like the capacity though, good 3+ season carry, but I like my G19/32/23 a little better....