I put this here because to me it's a mindset thing. If I'm wrong feel free to move it.
This was kind of a side discussion in another thread and I decided to start my own thread.
When I first started shooting I bought a lot of different guns in a lot of different (oddball) calibers.
After a while I realized that it cost a lot of money to stock all those different calibers of ammunition and different types of magazines and accessories and I decided that I needed to downsize my "collection" and concentrate on commonality.
One of the reasons I made this decision is because I don’t feel like I get to the range all that often so I want to maximize the time I’m there and I feel like getting myself up to speed on various platforms takes away from that so I stick with the one.
I looked around I did some research and eventually settled on the M&P.* I sold off all my other handguns (except my 4006 just because I bought it in a private sale) and bought an M&P9 and a 9C.
I now have one trigger to get used to and one type of sights. The grips on each gun are essentially the same and the sight radius is almost identical. I only have to buy one caliber of ammunition and I find it's easier to buy in bulk that way. Both guns take the FS magazines and now that I can buy Colorado legal FS magazines I can stock up for both guns.
This may not be ideal for everyone but for someone like me who has a limited training budget it works
*If I had to start over from nothing I'd buy one (maybe 2) Glock 19s and call it good but the M&Ps are adequate to the task and I can't really afford the loss I'd take selling them off to buy a Glock