I've been shooting a 9mm Glock, and have very little hands on experience with other guns, save my 410 shotgun and a 22 rifle and pistol. I haven't purchased the Glock yet, though (I've gone to the firing range a few times and practice with theirs, now that my son has moved and taken his with him--I used his a lot and liked it) (he's a cop)... and I've decided I need to go back to the range and tone up. (I used to be a pretty decent shot with the 9mm, but am slowly getting slack-ass lazy.) I've also decided that maybe I need to expand my gun knowledge to other models.
What's your favorite gun and why? (Or if you hate them, your criminals' or your protags' favorites, and why?)
What are common mistakes made in fiction / common terminology mistakes which drive you batty?