Taco Night is a popular one around here. We don't do it every week but at least once a month. This is how we do it!
We mostly use ground beef as our filling. Chicken and ground turkey occasionally make an appearance but beef is everyone's favourite.
Dave makes salsa from scratch. It has more of a pico de gallo texture with larger chunks of tomato, rather than being puréed. He adds cilantro, onion, garlic, lime juice, sugar, and salt.
Other toppings - cheddar cheese, chopped lettuce, plain yoghurt (instead of sour cream), and mashed avocado (if we have one) sprinkled with lime juice and salt. Everything goes into pretty bowls.