Here are some of my favorites:
Garbonzo beans, crumbled feta, chopped green onion, lots of fresh chopped parsley, olive oil, fresh lemon juice, salt and pepper.
Cannelini beans, chopped roasted red peppers, fresh basil, olive oil, balsamic vinegar, salt and pepper. Also good with olives or fresh mozzarella.
Black beans, tomatoes, cucumber, bell pepper, red onion, lots of fresh cilantro, cumin, fresh lime juice, salt and pepper, a dash of cayenne. You can also add corn.
Lentils, sliced green onion, currants, shredded carrots, olive oil, fresh lemon juice, salt and pepper. You can also add feta.