I did have a Hydrofoil as a kid, and though I don't want a Classified sized one, I would like Lamprey. For some reason, he ended up being a prominent figure for me. Probably because he was an early one for me (I had Snake Eyes and a Cobra Trooper, then later got Zartan, then didn't get anyone else until Airtight, Snow Serpent, and the Eel, then Lamprey/Hydrofoil and Frostbite/Snowcat were my first vehicles, then my cousin handed-me-down a bunch from waves 2 and 3), and since I didn't have a lot of Cobras initially, he became a bigger deal than he probably was meant to be.
Plus, have you ever seen what a lamprey looks like? I didn't until I was an adult and it still haunts me. Fawk. Like something you find at the bottom of a canyon in Peter Jackson's Skull Island.