I gave a Boxter S a bit of a thrashing for the first time the other day (in the confined space I had to work with meaning I couldn't get out of second) but fantastically responsive and felt surprisingly nippy, good roar too. My favourite car by a country mile in the TT, 350z, Rx8, Mx5, S2000 group. Felt like a sports car for driving not a posers car for impressing the guys and girls at work.
p.s. cars listed in order of preference so S2000 comes last in that group by my vote, if you were interested.
TT (dull, safe, superb car)
350z (fun, nice sounding, terrible car)
Rx8 (lovely design inside and out, great chassis, has the most underpowered, uneconomical, unreliable, tempremental engine ever)
Mx 5 (great fun, girls car, where's the power!)
S2000 (great gearbox, nice interior colour schemes, terrible chassis flex means it feels unstable at speed, worse under heavy braking, has no torque at all and has to be kept at an uneconomical 9000rpm to make and progress faster than your average 1.9tdi saloon)