I like Ferrari, the newer Volvos, some GM vehicles, I don't mind a JEEP, I like Mazda, Aston-Martin, Audi, Bentley, some Rolls-Royce, gotta love a 911, some Dodge.
The last incarnation of Ford cars look good to my eye (and I am not a Ford style lover in general), a shame they are stopping production of everything except trucks and SUVs and Mustangs. The Mustang is OK but I don't share "America's Love of the Mustang". With the exception of the Gen II, the Camaro always looked better to me. Before they turned to garbage, the Mopar muscle cars are style winners. Even the AMX looks good to me, Javelin not so much but still not bad.
I like pretty much every incarnation of Cadillac except for some 80's dogs. I much prefer the classic Mini to the modern one, but the BMW Minis are still decent looking. The newer Alfa-Romeos are killer.
I am not crazy about most Mercedes-Benz (the seemingly foot wide badges are the killer there; to me it speaks of insecurity, but I understand it's a statement thing with buyers), VW is getting better but they are plain looking in general, and OMG Ugly are all those grills on Lexus. Hands down the worst looking; a shame because they are otherwise decent vehicles.
Nissan can make a nice looking vehicle (even though they don't always come through) but I don't consider them cars so much as a College Fund program for the repair shop's owners.