I have lived in Jacksonville for most if not all of my life. It doesn't have the big city feel, but there's a lot to do if you know where to go. We have NFL and college games during football season. We host the College Gator Bowl game annually and have our very own NFL team, the Jaguars. Go Jaguars! There's the shrimp, blues, jazz and many other festivals throughout the year. There's lots of concert venues as well. We're right on the beach, close to St. Augustine (oldest city), 2 hour drive from Orlando, and close to snazzy resort towns like Fernandina and Amelia Island. If you have any kids who are college bound...well, there's many to choose from and not too long of a distance from major players like FSU and UF.
It's a good a place to raise a family; there's lots of areas to choose from. Like most cities and towns there are bad pockets throughout the city. As far as crimes go, we're ranked pretty high. I don't know what the comparison is to, but there's always something bad on the news. Those areas are usually the North and Northwest of town; however, crime can happen anywhere even in the richest of neighborhoods.
Good luck on your decision to move. If you do decide to move here send me a note. I'd be happy to share additional insight.
BBS