you'll want to stay out of the main thorough fare of St. Augustine, too artsy fartsy and prices and snobbish for a chicken person, however there are plenty of places, off the main drag, as Chris mentioned that are perfect for what you need / want. Being on the water IS a perk especially if you like fishing, however check insurance prices, and how bad of a flood area you are in where you intend to move to.
I really hate to say this, it actually makes me sick to my stomach but, look VERY carefully where you intend to move. Older neighborhoods might be better. I watched my area of town go from rural laid back, to Fkn warehouses and subdivisions being thrown up all over the place.
Along with the new neighborhoods come the HOA nazi's and them wanting YOU to abide by THEIR rules and such. Hi, my name is KAREN, we just moved in and I noticed that Your rooster makes noise, well I lived here 40 years, you lived here 4 weeks so go take a flying leap. Oh and the warehouses, lets not forget the lines of semi's now from UPS and Amazon as you sit for 10 minutes waiting your turn to get to the traffic light behind 40 of them. You might also want to take note of train crossings, and how often the train comes through and how long those $^%$'s will sit there and block traffic. CSX is in this town and don't give a rats ass about clogging up an intersection sometimes for an hour or so with a train across it.
I love my house, but if I known what I do now about these things, Id have moved somewhere else. Jax is a decent area, well North Florida in general, but need to learn the lay of your lad if you intend to stay down here, so you know what you are getting into long term.
Aaron