Burbank Airport is by far the most convenient airport to fly in or out of in Southern California. For short business trips, valet parking is the way to go. Longer trips, long-term parking is only $8/day and is very close. It's easy to drop people off, easy to pick people up, and because it's small, it doesn't take long to get to your gate. The only drawback is that there are only 3 security machines, so if your timing is off, you may have a long wait to get to your gate.