I prefer white or apple vinegars. Sometimes I'll add olives, but seldom any other vegetables to salads. Grandma used to always add radishes. I remember liking radishes, especially when they were cut into cute little shapes. Lots of variety.
Spices make a real difference.
Remember, too, that there are a lot of varieties of lettuce. Cook, drain, and rinse your pasta. Add oil, vinegar and spices. This one is from mom. It should be a nice blend of sharp and salty, but not too creamy.