In regular use:
A Tamrac roller-bag, just barely 'legal' for overhead luggage. Sometimes (like right now) used with dividers to carry camera gear, laptop, hard drives etc. but mostly with dividers out as a general-use carry-on bag. It's had a lot of use, and so wear, and is sorely in need of replacement. I'll probably buy one just like it (if I can).
A Lowepro Slingshot, which mostly gets used to hold camera gear in the boot of the car rather than for carrying cameras around, though it's used that way sometimes.
Two Lowepro large 'sliplock' camera pouches used as stand-alone bags (unfortunately, it seems, they're no longer available else I'd buy a couple more). One permanently holds an RF camera (whether M type 240, M3 or Hexar RF) and a few lenses - whatever my current "go to" gear is; while the other carries something else (whatever that is at any given time) - a 5D plus 50mm/f1.2 and 24mm/f2.8 is a common carry, or an OM-4T and a couple of Zuiko lenses, or (all too occasionally) a Rolleicord, or "whatever". These two are my most-used bags.
A Tamrac "snoot" type bag with 50D and 100-400mm zoom plus one other lens (often the 24mm/f2.8, sometimes a 18-55mmIS, sometimes a 35mm/f2).
All but the first have a random-ish collection of microfibre cloths, Lens-Pen lens brushes, spare batteries of multiple types and film or memory cards (sometimes both, sometimes wrongly 😱).
I have 3 other bags that get less use: one carrying a multiple-body Nikon film kit; one suited to carrying two RF cameras plus 4-5 lenses (both from Lowepro) and a small Tamrac bag with a Pentax SLR and two lenses.
I haven't bought a bag in ages, so I guess the above must suit me.
...Mike