If you have a trellis, yardlong beans are great! They climb quickly and produce prolifically. They tolerated my hot, humid summers better than any of the bush beans I grew and required no maintenance other than harvesting regularly.
@RickCorey, funny to hear you say you think of beans needing enough heat... in my area (nearly the same zone, very different climate) they were spring and fall crops, and only the yardlongs would produce in summer. For bush types, I grew a large number of varieties in yellow and green... but I interspersed them all, so I can't recommend any one over the others.
Limas never produced for me, and I tried three or four different varieties. It's a shame, they're one of my husband's favorite veggies. We buy them frozen, but I bet they're great fresh.
Favas are a bit unusual, and not to everyone's liking. Inside the pod, there's a coating around each bean. It's edible, so I left it on, but it makes them rather tough and chewy. For tender favas, you have to peel them, which is a lot more work than just getting them out of the pods
