Anything that is not self loading.
Revolvers
Things with non-detachable magazines.
AK pattern rifles. Just Meh.
SKS, I owned two of them and until I bought a Tavor they were the only semi-auto rifles I'd ever owned. Don't feel the need to own them again.
Revolvers. I'm not a big pistol person, these are like pistols that suck even more.
Things covered in wood. That **** is heavy! It's 2014, not 1914.
Mosin. Nope.
One of my roommates recently went the range with some old friends that relocated here. He's never owned a gun and he's talking about buying a revolver in .460 and then a reloading press and a Mosin.
Granted I probably wouldn't say no to a VEPR in 7.62x54R.
Shotguns: Busted shoulder makes them no fun really. I've never enjoyed shooting them before before that.
Yes, I am the person that wishes the NFA didn't exist so I could own AOWs and SBRs. But really I just want some sub-guns and PDWs.