This IS a tough one: oh yes! The 911 Series, all of them! I just love them! Best cars ever made. If I were to pick an all-time favourite, this would be the 996 Turbo (especially the modified Gemballa GTR 650 evo). Second place: the GT3 and the GT2! Third place: the rest of the 911 series.
And then there is that Cayenne: best SUV in the world! Let's not forget the 356 and the 959.
I DON'T like the 917, the 924, 944 or 928 ()! These are NOT Porsches, these are marketing bull*!