once my Kasandra is all finally fixed, setup n running perfecto, I'll be interested.
tracks I've been to:
Rockingham - sweeping open infield but the banked oval is too long tbh. this is more of a power track
http://micra.org.uk/threads/pollymobiles-rebuild.35251/page-8#post-413393
Oulton Park - yes my fav track. fast technical corners, hairy downhill 1st corner, great 180 cambered hairpin, scary fast double RH (careful in the damp/wet), hilarious -ve to +ve G dip before the start finish
http://micra.org.uk/threads/pollymobiles-rebuild.35251/page-52#post-512880
Castle Combe - high speed sweeping track. the very fast flatout first RH bumpy turn followed by the heavy left braking turn followed by the hard hairpin is butt clenching especially over 100mph in a turbo micra 
http://micra.org.uk/threads/pollymobiles-rebuild.35251/page-41#post-490008
Teesside Autodrome - a very fun short technical kart track. relatively low speed due to short length but ideal for exploring the nippy cornering of the micra and I learned to chuck it towards the apex with some inertia. loadsa fun 
http://micra.org.uk/threads/pollymobiles-rebuild.35251/page-55#post-517876
ideally I prefer full days cos gives me plenty of time to setup, test, check, retest and take all day.
can never have too much track time imo, like a kid in candy factory, only limited by track cost, and car running costs. just save up more 