I don't own any 9's. I have in the past (Ruger P89 and Heritage Stealth). However, I'd rather stick with .45 for CCW. Right now, I own 8 handguns (4x.45 ACP, 1x.357/.38, 2x.22lr, and 1x.22lr/.22mag convertible) My wife owns two (1x.32, and 1x.38). I just don't see a need for another caliber right now. If I can't afford to shoot .45 ACP, I shoot .22 that week.
Of course, I am in the process of building a new AR and will be registering it as an SBR, so I will probably register it in 9mm as well as 5.56 (also .22, .45, 7.62x39, and 6.8). So, I'll most likely end up with a 9mm upper for it one of these days. I can't say it'll cause me to run out and buy a 9mm pistol though.
Frank