I carry many things on my person which I use a lot.
On my belt- Cell phone, two glove cases with six gloves total (yes, I've used all six before in one call,) trauma shears, radio, flashlight (when working nights.)
On my person- Pens, penlight (nobody carries one), field guide, personal scope, chapstick, face masks, cigarettes, red bags for vomit (better than saying "just turn your head and puke on your carpet, thanks,") O2 wrench, camera, wallet, and bandaids(they're more professional than telling a pt "here, hold this" [referring to the alcohol swabs] after taking their blood sugar.) And finally my EDP/stairchair/reeves/cold weather gloves. I don't really mind if I'm judged by the contents of my "buff belt." I think it's very ridiculous to think somebody is a crap/new/buff EMT because they have a lot of stuff on their belt. I don't let ego/self-image get in the way of immediate patient care
and the whole "it's in the bag" justification.
I don't like wearing the pocket pants (they aren't very professional looking, IMO) so I go with straight legged (my agency gives us the option between pocket pants and straight legged.) I wear a uniform pocket shirt all the time on duty so I have the room in there as well. Basically I carry what somebody always asks the crew "Hey, does anybody have ___ (gloves, shears, O2 wrench, red bag, penlight)?