Last year, as a newbie, I grew what I could find at Meijers, which was all hybrids. However, they still tasted about a million times better than any tomato I had had before.
This year, I'm pretty much growing out what I could find locally via Craigslist - I did order some that folks had recommended on other forums.
Next year, I can grow out seeds - the house we're buying has a "mini greenhouse" - which is really just a glass enclosed space off the garage, with an area to start seeds under florescent. Which works for me.