It depends on what you like in terms of the city, weather, geography, etc…
I happen to like warm, dry weather and I think the Temecula Valley in general is an attractive area.
Schools: I’m not totally sure, my son goes to Catholic School – not b/c the schools in the area are bad, I think overall they are pretty good.
The People: As in most places, if you actually get to know your neighbors you’ll typically find they are nice. That being said, my section of the neighborhood (Paloma Del Sol) is so-so. The area around my street has become full of rentals – probably 50% or so, which in IMO has become a problem (some crime, dorm houses). A mixture of gray collar (myself included) and blue collar and sales types – this mixture largely the result of the housing bubble.
The commute (for most): After 5 years of commuting to RB it is getting better with the freeway improvements. But to be honest on the eve of my 40th the commute is getting old – even though it only takes about 40-45 minutes or so, it’s still 39 miles to my work (I do carpool, which gets old as well).
Overall: South Temecula is a pretty good place to live – the air is still clean, night sky still somewhat dark (backyard astronomy), crime although low is rising. It’s a mixture of locals and transplants. Local (good paying) jobs difficult to find, but it is possible to find one.