TL;DR - I'm a big fan of Godox' new V480 for general on-camera use as well as for fill with off-camera flashes.
You've gotten excellent feedback so far. I'll chime in with my use cases and solutions, which overlap with others' but also differ somewhat and push (shrink?) the envelope a bit.
I mostly shoot corporate events, but I also second-shoot 5-10 weddings in a year. When I'm working with on- and off-camera flash, I often put a smaller flash on my camera to save weight, since it's generally for direct fill (not bounce) at relatively close range. These days, it'll be a V350 or V480, with my off-camera being one or two AD200s on stand(s) for back/side light (dance floor) or V1 with a
FlashDisk mod in my left hand as main light (grip & grins). If I'm working with only on-camera in a space that requires more power, I mount a V1.
For your consideration, I'll comment on each of the hotshoe flashes in my kit. Most of them are Flashpoint (for warranty and excellent tech support from Adorama), but I'll use the simpler and better-known Godox nomenclature.
TT350 - Full-featured, tiny and light, with enough power even under 15' ceilings when letting ISO drift up and underexposing dim ambient light by 1 or 2 EV with f4 or larger apertures. I've been pleasantly surprised how little power I need when using it this way, and I've never exhausted a pair of Eneloops in an evening. When bouncing, I tape a white biz card to the head for fill. (I'll explain why I use the biz card instead of the white done or built-in bounce card if anyone is curious.) I've now replaced this with...
V350 - Same as TT350 except for the li-ion battery that can be shared with the...
V480 - In terms of size and power, this is halfway between the V350 and V860III, but in terms of weight it's closer to the V350 - only 100g more - which is a huge deal for me when I'm working 14-hour days. I like the touchscreen interface and hope Godox will bring this to the base V1. On-camera TTL exposure on my Sonys is the best of the bunch. The ability to flop the head 45 degrees to the rear is also super-useful.
V1 - My all-time fave, it's now competing with the V480 for my affection. In terms of utility, it's the best in my kit - plenty of power, a decent interface I can actually decipher without reading glasses, and a round head. Ah, yes, the round head. I was a skeptic, but now I love it. Not for the round light pattern, but for the magnetic accessory kit (shared with the AD200's optional round head), especially the bounce card I can spin to send light in any direction. Super nifty, that. The V1's round head also holds the aforementioned FlashDisk mod more securely than the...
V860III - I had this before the V1 and liked the ability to zoom to 200mm to spotlight a stage while keeping light off a projection screen above . But, barn doors on the V1 can serve this function better, and the V1 is otherwise just more versatile. So, when both of my V860IIIs died, I replaced them with two more V1s.
For reasons I won't go into, I've lately had to work more with two heavy cameras (with zooms) rather than my preferred three lighter cameras (with primes), and it's taken a toll on my body. Using lighter on-camera flashes helps, which is why I'm favoring the V350 and V480. OTOH, for shorter gigs where I'm bouncing on-camera flash a lot, I go with the do-everything V1. Since I'm almost always balancing with low ambient light and not machine-gunning, I don't need the power or endurance of the V1 Pro or V100.
My basic event kit includes three cameras, two V480s, one V350, a spare battery, etc., in a carry-on-size rolling case, and one stand, an umbrella, and a V1 in a stand bag. My expanded kit adds another stand plus two AD200s and another V1 in a small backpack.
Questions are welcome.