I feel the same way about cameras. There's just no other way I'd be able to put in the time scouting and hunting to equal the amount of info a camera can give you.
I guess whether they affect my hunting psyche in a positive or negative manner depends on what I get on camera. They have motivated me more often than not. But there have been times when I feel like I have nothing to hunt, so I either don't, settle for what I can get, or try somewhere new and hope for the best.
I will say this - a lot of guys would be shocked if they knew what was walking around at night. And trust me, when you know a true brute is in the area, then letting those smaller/younger bucks walk is a lot easier... same thing for sitting all day/longer - man it helps when you know what is walking around in the area.