All but shotgun, and even then I've been debating picking up a kit so I can roll my own slugs.
At least 30 rifle cartridges, and half a dozen pistol, so by variety I load more rifle but by quantity of loaded rounds produced, it's pistol.
Reloading is more than about saving money though. It's about variety, precision, passing time, availability, and just plain enjoyment.
For example, here's a neat trick. Select a light .45 colt load. Charge the case, then drop a gas check on top of the powder. Add some fine shot. Then seat a light bullet on top of the shot, and crimp. Make sure you've chosen a load that accounts for the total weight of the gas check, shot, and bullet! Then impress all your buddies at the range with your mad speed skills, killing balloons rapid fire!