To start with I'm left handed and in a lot of cases that makes using some holsters impossible because they don't make them. Where possible I try to get something ambidextrous so if I decide to get rid of it I may be able to sell or trade it.
I have an old adjustable Gilmore Speed Leader for 1911s it will work with both a stock 5" and a comp'd barrel. The other 1911 hoister I have is a Hellweg Swat that I made a piece for to drop and offset it (removed for IDPA)
For Glock long slides 17L & 24 I have a Safariland 007. For the 19 I'm using a Fobus paddle holster or one of the Glock molded b