I did this four years ago. I posted about it here and I was very surprised at the number of people who were in agreement with me that it was a good idea.
What I find interesting is that as time has gone on several of those same people had suggested to me that instead of limiting myself to one platform I limit myself to one gun.
I do find that when I go to the range and I shoot the one gun, my Glock 19 I get more out of the session. I don't think I've shot anything but my Glock 19 or my glock 26 in probably three years.