Most of mine are filthy.
I usually change the recoil springs in my government models around 2000 rounds, and when that happens I detail strip them and clean them. Between recoil springs, I may pull the slide off once or twice and do a quick wipedown of the internals (rails, feedramp, etc). They do get bore-snaked and oiled on a regular basis though.
My compacts stay pretty clean compared to my government models, but mainly because the springs dont last as long. They also get detail stripped and cleaned with a new spring. I normally dont bother pulling the slide off and wiping the rails down between springs, they get a new spring every 500 rounds or so.
My former AR15 was kept pretty clean, mainly because of the ciener .22 conversion. Those things leave an awful mess.
But when I do actually clean a gun, there's normally brake cleaner involved. Lots of brake cleaner.
As for my thompsons, my shotgun, and my Glock, they get boresnaked and oiled. My shotgun and my thompsons do get regular wipe-downs though.
I used to be real picky about keeping them clean, but it got old after bringing three or four (or more) dirty guns home from the range every weekend.