Yeah, no kitties or couches :P. If you DO decide to try paintball, it involves a lot of shopping around. A good place will let you play for a few hours for about $50. Most of the paintball arenas will shill you like crazy. If you're in the Calgary area I highly recommend "Bragg Creek Paintball". If you get a little more serious, you can spend $200 and get your own gun kit from a site like www.paintballgear.ca (really good for Canadian orders, not sure where you hail from). Once you own a gun, paintballs become a LOT cheaper!!! I would advise against buying paintballs from anywhere but the course, because they'll charge you to bring them.

Another thing, don't do indoor paintball. If you're anything like me, you'll love tromping through the forest, hiding behind trees and car hoods, it's a lot more like playing a good FPS game, because there's a lot more room to move around.

The thing that really ruined FPS for me was the realism that paintball provides. You duck behind obstacles, and you feel bullets whizzing over your head. You run like you've never run before, and you don't notice how much exercise you're getting because of all of the fun you are having. You can do all kinds of crazy tactical and flanking techniques, support your friends, and these things actually come into play in paintball, where in an FPS it's usually an 'every man for himself' type thing unless everybody's wearing a headset. I think that there's something about running through the forest with a replica M16 that gets me a little giddy too.

Also, make sure you avoid the dicks with fully automatic paintball guns. There are players who will drop $5000 on a sweet gun which is basically EZmode against your standard semi-automatic paintball gun. They fire at something ridiculous like 30 rounds per second, and basically make you duck behind obstacles and fire blindly in their general direction. Avoid these pricks at all cost, they will ruin your experience.

TL;DR, don't go spending money on gear until you go once, if you'll love it then one trip should be enough to get you hooked in and looking at guns n stuff.