self defense
Glock 30 or 36. Both 45cal. the G30 holds 10+1 and is a little thicker but not a lot, than the 36. The G36 is a single stack magazine and thinner. Its a little easier to hide and fits smaller hands well.
The advantage to a glock is no safety. If you're in a panic situation, and have to draw your gun, get on target, will you remember to take the safety off before you pull the trigger??? in that situation, the difference between life and death is milliseconds. I train regularly and I prefer to not worry about a safety.
I do like the 1911 models. I've got a Springfield Ultra Compact on order, been paid for and ordered since Dec but they're hard to get. There's a lot of good companies. The 1911 is comfy in the hand, has a great trigger, and is easily concealable, like the G36. Only draw back is you have to carry "locked and cocked" and worry about the safety.
The Glock subcompacts are nice. I think new Springfield XD sucompacts are a little more comfy in the hand. you can grab it higher. try them out.