Looking for spirited driving?
Palomar mountain is great (technical), and then from there you can hit Highway 76 which goes through all the Tribal Reservations, which is a really beautiful and fun drive. You can then take the freeway to the Ortega Highway, which runs to the beaches in the OC, pretty fun drive but there is traffic in the morning.
You can also run up the 15 to the 18 (through Apple Valley, PM me for a map) and go the back-way into Big Bear, which is a great twisty drive with some degrading S turns (two back to back at one point), fun uphill and CRAZY coming back down (did it in a mini-van once---talk about brake fade... rotors were actually glowing after 45 mins of 20 degree grade)
Also... Oceanside backway through Fallbrook and De luz... Really twisty, crazy drive, pretty scenic and sometimes scary. Little to no traffic EVER, road gets down to about sidewalk-thin at some points.