Looking for s particular caliber? Any firearm is good just as long as you keep it clean and in working order. 1911 and Glocks I feel should not be the beginners pick for a firearm, just me. Though If you're set n interested in a 1911 and want it for carry and self defense then look to a Springfield EMP (3") or the EMP- 4 (4"). This is a 1/xx size model of the 1911, only to be found in 9mm or 40cal, and is great for carry n good for home protection. These come with the ambi safety. I find the EMP- 4 is better for the bells and whistles one is looking for. If you want the 45 ACP then look to the 4" versions of the 1911 or even the newer 3" versions. Colt puts out the Defender (3") in 45 ACP and 9mm.
Like mentioned up top, get to a firearm store and see which you like best. Try not n talk to the person behind the counter on which he says you should buy. If they have a range there see if you van try the firearm you like out.