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Cinnamon Ice Cream with chocolate cake.

Chocolate chip cookie dough ice cream over a warm brownie or nice warm chocolate chip cookie. Mmmmmmmmmmmm...

Besides the usual NY faves (Il Lab, Brooklyn Ice Cream Factory), I love Creole Creamery in New Orleans. It's an old-fashioned ice cream parlor with flavors like chocolate breakfast (with maple syrup flavoring), creole creamcheese, lavender honey. They usually don't ship their ice cream, but they might if you beg.

Coconut ice cream from the old Gifford's in Washington, DC. Shreddd fresh coconut held together with just a bit of sweet cream vanilla. None better and now a just a sweet nostalgic dream. A close second - chocolate frozen custard from the Polar Bear stands, also in Washington, DC, also long gone.

Concretes from Ted Drewes Frozen Custard stand in St Louis are completely irresistible! Ditto profiteroles made with the richest homemade ice cream and hot fudge.

i'm a mint chip girl! though i am also a big fan of the Wattamelon roll -- does anyone remember that from the good ol' days at friendly's? raspberry and lime (?) sherberts, chocolate chips. I wonder if I'd still like it, or if I'd find it too sweet?

Chocolate-vanilla swirl frozen custard in a regular cake cone dipped into that weird chocolate coating that hardens. I think half my appreciation for it is that they dip the ice cream in UPSIDE DOWN! How does it not fall off?

Burnt Caramel and Earl Grey tea ice cream at Toscanini's and Ginger Molasses and CARROT CAKE ice cream at Christina's!! Both locations in Cambridge, MA.

Capogiro gelato (and I've only had the pre-packed pints from Whole Foods)
Otto on 8th Street and 5th Avenue
Cones on Bleeker

Handel's Ice Cream in Ohio - I have not found a better ice cream - particularly their Butter Pecan. My fiance loves their Chocoholic Chunk.

(I will also throw a little weight behing the Graeter's nomination, though)

Sheer Bliss ice cream which comes from Florida and is sold in round tins in Garden of Eden in New York. Creamy, luscious and addicitive.

This is a really really tough question, and Ben and Jerry's Dublin Mudslide is amazing, but I would have to say that the ice cream to end all ice cream is a flavor entitled KGB from Ben and Bill's Chocolate Emporium in Oak Bluffs, MA on the island of Martha's Vineyard. It's a mix of Kahlua, Grand Marnier and Baily's Irish Cream. It's so rich and creamy, the alcohol is still just a tad present and the mix of flavors is just perfect. It's incredibly decadent and with a few sprinkles/jimmies/whatever you call them, the contrast of textures makes for a truly transcendent ice cream experience.

OMG! I totally forgot about Max & Minna's ice cream in Queens, NY. They have all the standards, but then they have flavors like ketchup, lox and cream cheese, and garlic. I think I tried broccoli there once. Their novelty scoops are cool, but they're other flavors are just fantastic amalgamations of all the ice cream dreams ever.

The Penn State creamery is pretty good, too. ;-) I'm rather fond of their flavor called "happy happy joy joy," vanilla ice cream with shredded coconut, dark chocolate bits, and toasted nuts.