Well all here is my 2 cents:
I have a Sigma and love it, I know, it has a terrible trigger but like an ugly dog you get to like it after a while and it fits my hand very nicely.
I also have a Ruger SR9C and this has an excellent trigger and a rear sight that allows you to adjust for elevation and windage, plus a thumb safety to give you some added protection. One quirk of the Ruger is that you have to use the weak hand to release the slide the side lock only locks the slide but does not allow you to release it so you need to use the weak hand to pull the slide back and let it fly forward on fresh magazine.
I had a Glock and sold them, they are nice guns but they just do not fit in my hand with comfort.
I also have a new M&P, once you get by the trigger issues it has great balance and an optional thumb safety if you need it. Both the Sigma and M&P fit like a glove in my hand.
With all this being said the Glock has been around the longest, has great support, lots of accessories and a very good reputation.
Regards,