i like vanilla. i like mint chocolate chip milkshakes alot too. the chips get stuck in the straw if it's not made to perfection though. i get sad when that happens. :-(
at haagen-dasz they have a shake with chocolate ice cream, chocolate fudge, chocolate chips, chocolate sprinkles, and whipped cream. It is heaven in a cup, i think I will get one today.
When I worked at Burger King, we used to clean out the shake machine every night with bleach, and then run the bleach through the machine, as well as rinse it out with water.
Every now and then we'd skip the whole rinse procedure and just put the shake mix right in the machine - noone ever complained. Good times.