LOL, I almost dropped my double espresso when I saw this question come in...
Lets face it the Porsche Boxster is a "Drivers" car and a very good one at that! Does that make it a girls car? No, it makes it a enthusiasts car.
If you want something that is going to perform well, have a decent power to weight ratio and actually drive nice and not just burn up the rubber then the Porsche Boxster is perfect.
Does it being a 2 seater convertible make it a girls car? err no, think MGB or Healey or Honda S2000
Currently as I write this Boxsters are the cheapest Porsche you can buy (pretty closely followed by the Porsche Cayenne), my advice would be to buy one NOW before they turn the corner and go on the inevitable price hike all classic Porsches follow.
The early 2.5 Porsche Boxster is a great starter car car, loads of fun, handles like a go kart and is cheap to fix with loads of spares being available.