The kind the person who offered to eat ice cream prefers. I only usually eat it on things like a date, so its handy to get to know someone's tastes in sweets.
Chocolate as well, though I prefer it to be a bit more "special." Be it with some chocolate sprinkles or bits, some nutty stuff like crocant, fudge, caramel... Something
Ooo! Ooo! Bubblegum, there's not really a lot of places that you can find it or just tubs but I love the stuff. I also like those I think there called Rocket pops? The Red white and blue ones, I found a tub awhile ago and haven't been able to find anymore.
Swiss cake! Is basically icecream with cake pieces in it as far as my tastebuds can tell. I also love passion fruit flavor, lime pie flavor, coconut flavor, and good ole' chocolate; BONUS points if it has browny pieces and is made with Dominican Cocoa or South American Cocoa instead of African Cocoa (this one tastes more oily)
Oh there's a lot to choose from. Hard to pick just one XD. If I did have to pick, maybe cookies and cream or its variants (like chocolate cookies and cream or mint cookies and cream).