For about 6 months of this year it was a .44 Magnum Raging Bull with an 8.375" barrel.
Now it is my Glock 17L.
I've also carried a Taurus PT92 and Taurus 24/7 OSS.
I don't like small handguns so I don't bother with them. Once you figure out comfortable positions and functional garments it isn't that hard to carry a decent-sized platform. One day carrying my Raging Bull I walked around for a good 3 hours at a fair, took a two-hour nap on the couch, and sat through a movie, all without removing it or even fussing with it (except when I painfully rolled over on it during my nap--that required some adjustment heh)
In the summer I usually conceal under a vest and this is all anyone sees, regardless of what I'm carrying. I always got a kick out of surprising close friends by showing them my Raging Bull after having been around them for a couple hours--they never noticed it.
I am actually considering the merits of cutting my G17's grip to G26 length so it can be concealed under a t-shirt. It works okay now under a t-shirt (size small, btw), but sometimes it shifts and the grip will print. Taking that 1+" off the grip should help a good bit in that regard, and when it isn't as important I can just put a standard mag back in there with a mag adaptor to get the "full" grip back.