Pros and Cons
I realized that my previous post did not address the question of pistols and revolvers. The primary advantages of revolvers is that they do not jam and hold more powerful cartridges. The magnum rounds in some revolvers hit with power that most autoloaders can not touch. Many would cite the 10mm or the .50 AE. However, they will never touch the .44 Mag or the .500. Also, revolver cartridges are very reloader friendly. The second advantage is that they do not jam. If you pull the trigger and don't hear a bang, you can often attribute it to a bad primer. Just pull it again and you'll hit the next round. No need to clear a jam.
The advantages of autoloaders are majorly increased capacity, easier concealment with longer barrels (a 4" barrel in an autoloader is much easier to conceal than a 4" revolver!), lighter weight (most of the time), and, often, better ergonomics. If you don't hear a bang when firing an autoloader, it's time to tap and rack. You have to clear the faulty round before you bring the next one into battery. There is also the possibility of a jam or stovepipe. Dealing with jams should be a part of your regular training and can be taught to be dealt with quite quickly and efficiently.
Both options are a push for me. I grew up on revolvers, but I presently carry an autoloader and was formally trained with an autoloader that I trust implicity. Do not let anyone tell you that revolvers won't break. They will. Do not let anyone tell you that a certain type of autoloader will never jam. It will. The strongest combat steel and the most reliable combat tupperware are NOT perfect and WILL fail given time and any number of conditions. It is YOUR responsibility to learn how to compensate for these imperfections in the field. Let no one fill your head with any other ideas. They will get you killed. Dead. Pushing up daisies. Your wife a widow, your kids orphans. Stone cold. NEVER forget to train for malfunctions no matter which option you choose, and, most importantly, remember that your first duty when defending yourself and only yourself is to NOT DIE. You damn well better make sure that doesn't happen. Now, train! (Sorry, I think I was temporarily possessed by the spirit of my deceased CQC instructor. **Shakes head**)