My Smith 686+ ... If I could keep two, I'd add a 1911 ... but the Smith is absolutely the neatest gun I own ... and the most practical, for a variety of uses -- SD, emergency hunting, fun at the range ...
I’d have to go with my H&K P2000SK. It’s extremely accurate for a pistol, 9 mil ammo is easy to find, 10 round capacity magazines but it will take higher capacity mags, it’s fun to shoot, it’s 100% ambidextrous (I’m left handed) and it’s fairly easy to conceal. The last time I went hunting I shot a 9 point buck that was only 10 yards away. He was so close I could have taken him down with my H&K, but all I had with me was my Winchester Model 94.