Now that I drive an Explorer at home, I prefer Explorers, Blazers, or Monteros. Failing that, one of the new Lincolns, a Bonneville, or a Taurus. Conversely, I detest Grand Vics/Marqs, and the Buick Century and equal GM cars. I also didn't use to like the Volvos because they didn't have enough headroom, but I like the new S70s.
So, I either rent a Taurus at Hertz and hope I'm not "upgraded" to a Grand Vic, or rent at National locations with Emerald Aisle and hope they have a Blazer or Montero and not just Jimmys.
Anything smaller than a Taurus, and I'm driving while looking out of the top of the sunroof...