I'm more of a storm spotter rather than a chaser - I don't even have a vehicle to call my own. My apartment building has a nice rooftop sundeck, so I just go up there whenever I see a good thunderstorm come up. In Alberta, during the summer, thunderstorms will often develop and and come rolling in out of the foothills east of the Rockies. Edmonton doesn't usually get hail as much as Calgary does, but the Edmonton area sees more tornadoes, though. It sits right at the northern end of the Tornado Alley. I've never seen a tornado, but I've seen funnel clouds about three times, once right from the rooftop sundeck.
My best storm was back in June '97, when a beast of a spectacular supercell, a rotating thunderstorm, came right overhead. Most of the lightning was flashing in the upper levels of the storm, rather than at the base or cloud-to-ground. This told me that this beast was still sucking in great amounts of warm air. Mind you, this was in broad daylight, but the lightning was still bright. The cloud structure of the updraft part (the rotating part) was really amazing - you could see all the way up to the anvil (the flattened top) - all 40,000 feet of it. There was hail, but it wasn't very large, however, it did dump a lot of rain - incredible amounts of it. No tornadoes from this storm, although another storm was reported to have developed at least a couple of large funnel clouds NW of Edmonton.
The supercell is the most dangerous type of thunderstorm, as they are the ones responsible for tornadoes, giant hail, and highly damaging winds. One main characteristic is a rotating updraft base, where warm and humid air is being sucked in. It's also known as a rain-free base, and that's where a tornado is likely to come out of. Supercells are so called because they can last a lot longer than ordinary thunderstorms, as much as 10-12 hours, compared to an hour and a half for ordinary ones. The one I mentioned in Edmonton lasted at least 4-5 hours. Most supercells are found in the US Midwest, where the heart of Tornado Alley - and storm chasing country lies. I've seen supercells several times in Alberta.
Like Pilot 1113, I check out the Weather Channel regularly, and like to read about weather-related stuff.