Looking for a serve-yourself idea for a party for 10-20 people.

A taco bar would be perfect, as it can provide a nice variety of foods and people can customize to their taste and dietary preferences, which can be quite varied. And the preparation and set up are pretty easy on the host's end.

However, I feel like taco bars are done to death and boring. What's something similar I could do? Preferably avoiding a big carb as the main show (such as pasta or mac and cheese).