A home grown heirloom tomato is amazing. The stuff that they try to pass off in the stores as a tomato is awful.

If a sliced tomato is slimy on your sandwich, that's not a variety problem, it's a preparation problem (in that application, tomatoes, regardless of variety, should be seeded.) Bland may be a variety problem, though it can also be a poor handling problem.

If there is no flavor, you are left only with texture.