I live in Mira Mesa, have for over 6 years. Definitely the best bang for your buck in San Diego, in my opinion. Great retail, very convenient commute to Sorrento Valley, 4 exits on the 15 so plenty of options to avoid heavy traffic, etc. And it’s SO cheap compared to any other area, except perhaps Chula Vista.
My neighbors are the coolest. One invites us to all his July 4 and birthday parties. Everyone’s really down to earth.
That being said, the neighborhood is definitely in decline. There are Target shopping carts left on the side of the road every block or so. People park huge RVs on the street, and sometimes on their front lawn! One guy stucco’d his entire house lime sherbert green on Gold Coast Drive. I can’t stop laughing every time I drive by. I feel bad for his neighbors though. There are a large number of renters in the neighborhood. Every 6 months, I’ll see a street full of broken car windows, as the kids went crazy the night before. The list goes on and on.