basically i do mostly structural steel on ships. Mostly fishing boats but currently a private yacht. So i do a lot of welding, cutting with a propane torch, grinding and such. I use my knives for anything from cutting line to chipping the slag off my welds to cutting up my lunch.
i'm also "into" fish, as in aquariums, fishing, as in rod and reel, shooting, hiking, camping and outdoors stuff in general.
Typically i carry a quality folder like a spyderco native or an emerson hardwear knife or a kershaw speed bump, and a SOG multitool and now a leatherman mirca on the keychain and then i have an old file knive in my tool bag and a spyderco police. And ofcourse a ton of knives in my truck. I think right now i have a cold steel canadian belt knife, a kershaw junkyard dog II, a KA-BAR large heavy bowie, a gerber guardian, a gerber gator fixed blade, a CRKT cruiser, a ColdSteel ODA in Carbon V and probably some more i forgot in the glove box.
Now that i think about it maybe i carry too many knives...