At a restaurant or the like, usually either bleu cheese or ranch.
My absolute favorite salad dressing, though, is made from bacon grease, cider vinegar, and sugar. Pour it still-hot over dandelion salad, or other robust greens (endive will work, if dandelion is out of season).
When I was a kid, it was pretty common to have Roquefort dressing available. I don’t know if it was made with genuine Roquefort cheese or it was just synonymous with bleu cheese, but you don’t see that much anymore.
I usually don’t eat salad. (It’s not that hard to substitute something else for it; for example, at an Indian restaurant I go to, I ask for extra rice instead.) When I do, I don’t put dressing on it.
I voted other, but my dressing is a traditional French dressing: Edmond Fallot Dijon mustard, white basalmic vinegar, and olive oil. Wonder stuff, and easy to make.
I make my own Italian dressing for salads at home now. I got tired of paying $3-4 dollars a bottle for a quality dressing.
1 cup olive oil
1/2 cup red wine vinegar
1 tbls granulated garlic
1 tsp salt
1/2 tsp coarse ground pepper
1/2 tsp dry oregano
1/2 tsp dry basil
2 tbls grated parmesan
1 tsp honey
1 tsp dijon mustard
1 raw egg yolk
Shake to mix thoroughly, let it rest in the refrigerator for the flavors to marry.
This is to my taste, but others may prefer a 3 to 1 oil/vinegar mix for less bite, or less salt. The raw egg yolk is necessary for emulsifying, but if you don’t mind it separating, it can be omitted. The honey and mustard will emulsify it somewhat.
I wanted to vote for Roquefort, but it’s not on the list and it’s too close to blue cheese to vote ‘other’. Yes, they actually used Roquefort at the places I had it as a kid. I remember Bob’s Big Boy had both blue cheese and Roquefort dressings in the supermarkets.
I could eat big chunks of blue cheese out of hand, without crackers. And by ‘could’, I mean I do whenever I have the chance.
It depends on so much; what the previous course was, what the next course will be, what I’m drinking with it (and yes, non-alcoholic beverage choices play a role), what’s in the salad, what dressing I had the day before, etc.
Having said that, I generally default to Italian or Blue Cheese if the variables are either unknown or pedestrian.