I save tomato seeds and okra seeds. Unfortunately, the Arcadia Broccoli that I love is a hybrid, or else I'd save that, too!
Working my way up to saving beet seeds at some point, because I grow a LOT of beets!
And, Buttercrunch lettuce, once I learn how to!
This season, I'm trying two new SUPER EZ ways to save tomato seeds. I'll post my findings after I start the seeds in December, based on the germination rates.