San Diego is a great city if you can afford it!
I have lived in San Diego for 10 years now. Something I have noticed on this site is the majority of city reviews are very negative, across the board. So here is my personal view and experience with San Diego, good and bad.
The beaches here are beautiful. And there are many to choose from. The water is cold and blue and lovely.
If you like surfing or paddle boarding or water sports in general, its a paradise.
You can rent sail boats here, and for much less money than you would think. Groupon often has deals that include sailing lessons along with the rental.
You can ride horses on the beach here.
You can take a hot air balloon ride over wine country at sunrise just 45 minutes south of here.
There are vineyards and breweries and places to have a proper English tea if you want it.
There are many parks, some with playgrounds, others with small lakes or paths to explore.