I'd say - start driving your car like you stole it. Maybe you're just not pushing it enough. Keep the RPM's up around 4-6 k in ordinary driving. Take turns harder. Find some winding roads an push it hard. You have a rad car - think if it as your $35k go-cart.
A few months ago I test drove a 350z on a whim and the salesman and I really tore it up - 4 wheel drifts, smoking brakes, lots of full throttle and full brake action. It was a blast. When I got back in my car, I started driving it harder and fell in love with my car all over again.
2001 325i: Steel Blue, Sport Pack, 5 Speed Manual, HK, Moonroof, Myrtle Wood, Steering retrofit. No real mods (yet!)