I've never had the pleasure of owning a porsche, but have driven a friends 98 carrera (model 993 Last of the air cooled engines)
Opinions - As nicely as my new and old BMWs handled, the Porsche is on another level in terms of road and steering feel.
#1 - Porsche feels like your ass is almost glued to the ground. Most likely due to ride hight, but also the suspension, wheels and overall dynamics
#2 - Porsche suspension settings are much harder. This is not a car to take the family to the grocery market.
#3 - Steering has a very direct feel, similar to BMW, but magnified
Lastly, the porsche sound is very distinct. On any other car, I think the sound would be cause to run to the mechanic to say WTF. Air cooled engine sounds very different at idle and is a dream when revved up.
Porsche is my dream car, but for the same money as the 997 S with some (not all) options, you could get a vette and a BMW e90
E90 TiAg 330i ZSP, ZPP, ZCW 6sd Manual, Nav & Satellite (for Stern!), Black leather w/ Poplar