In all honesty the best ranch I've ever had is the kind you got at school. They serve the same ranch in several restaurants, such as Red Robins. I believe it's "generic" ranch. I would love to be able to buy me some. Shit is delicious.
Hidden Valley but you gotta get the the packets and make that shit yourself. It tastes terrible out of the bottle. The buttermilk ranch is okay. I always be combining ranch and ketchup shitfaced at jack in the box and i looked that up one day and some company makes ketchup ranch. Jack in the box ranch is hella good too. My favorite is from this pizza spot in Sonoma County called Union Hotel. Theres gotta be crack in there.