Started on a P99 AS - DA/SA striker, moved to a Steyr M40 (LOVED it), then P230 series, then fired a 2.25" SP101 at the local range...and bought 3" one a few weeks later.
I converted for a multitude of reasons - for starters, I found that SP had more Character in firing than ANY semi I could imagine. The trigger (once tuned) was far smoother than even a Sig P229 I shot. When firing, it's not "pull-trigger, go-bang, little hole in target somewhere", it's "pulling trigger, cylinder rotating, hammer drawing back, (can hold it there also), BANG!, and hole where I was pointing (if I did things right
)" The recoil is predictable on them (as opposed to "bouncy" like I find most 9's to be), and a well-designed revo (SP, J-frame, K-frame) allows a VERY low bore-axis if you're choking up on them.
For concealment - a Revolver has a curved grip and VERY narrow frame/grip/barrel, and the ONLY wide part is the cylinder. This means that the curved grip and thin frame sits on my hip at a typical 4 o'clock IWB better than ANY semi can try to, save for small blowbacks and ultra-tiny useless-to-me semi's. Now, to be fair, the PPK hides better than my SP does, for obvious reasons - but that brings me to the another reason I switched to a revo:
Versatility.
With the revo, I can stoke it with full-tilt 190gr hardcast/2400 Wilderness loads, or back it down to powder-puff .38 special wadcutters for carjacking defense (less muzzle blast, the better - your range is mere feet or inches). I can go midrange with 135's over a medium charge of Universal for a good street load (without the ridiculous blast of pocket 9's and the pokey-performance of .380's), or go with some 358429's in .38 cases for some range fun. I've even rebuilt a .38 case with a .355 115gr bullet over the original 9mm charge for sheer kicks.
Also, unlike all the semi's I've owned (which I've found maybe 1/3 of the spent casings from), my SP drops ALL my casings into my hand when I've expended the cylinder. Empties to the pocket, hots into the gun. I've pushed around 750 rounds through my SP so far, and have just begun to throw out a few of the original 150 cartridges I bought factory, due to neck splitting. Reloading is a cinch, I don't deal with the timing of semi-autos or blowbacks - I put the powder in, I put the bullet in and crimp it (strong roll-crimp too, don't have to worry about taper and headspace), and call it a round. Or 5, for that matter.
I also have pick of .38 Short/Long Colt, .38 Special and .357 Mag, vs. trying to find some current in-demand tacticool round everyone is buying in large stock for their basement fortress...
Oh, on magazine-size restrictions, assault/military-weapon stigma? Mah, I'm not worried. I stop at 5 rounds onboard. I've found HKS 36-A speedies at my LGS through every dry spell, and I can stoke my speedies with whatever I want. Load up some .38's in one, pack my wilderness loads in another. Heck, I've even done a rack of .357 where 4 of them were 3.9 of Universal and the last was ~13.8 of 2400...hand it to a friend at the range and tell them to empty the cylinder, without them knowing where that 2400 is...
Sure, I've realized that in combat, semi's are faster to reload and shoot, bar-none. I've also realized that most semi's have ridiculously fast triggers compared to the slow and long DA pull of my SP, and they all carry a LOT more rounds onboard.
But, I'm NOT a veteran, I've never been through a tactical course, and I'm not an LEO. Most of my use of my pistol will be range/target/plinking, and 0.02% of my use will be in a legitimate SD scenario. Even in SD, the slow reloads don't bother me - if I have time to reload, I have time to run. If I don't have time for reloading/running, then something else went very wrong along the way.
Likewise, if I come across something that can soak 5 rounds to CM or chest or head and it keeps coming full force, then I won't be concerned about reloading the next 5 as much as where my knife is for that last ditch temple/jugular-carotid/spinal-cord hit, or how exactly I wound up in this position in the first place...