We like Tybee Island. This was our second visit and while the locals kept apologizing for "low" temperatures in the mid-50s to low-60s we found them very comfortable
We enjoyed several local restaurants, Bubba Gumbo's in particular.
The property we rented was very clean and comfortable. We travel with our 11-year-old Bassett Hound and found this rental to be particularly dog-friendly with a partially-fenced yard. The town, however, is not very welcoming to pets. Every other spot we've visit on the shore from Maine to Southern Florida makes accommodations by allowing dogs on-leash to walk the beaches either preseason or during certain days and/or hours. Tybee might want to look at the Bark Beach policy in Boca/Del Ray, FL.
Also, carry a role of quarters if you want to eat along Butler (the main street) or do some souvenir shopping at a store that does not have its own parking lot. We watched a parking enforcement officer handing out tickets at 10 a.m. on a Friday when there were only three cars visible on the entire street. At $4/hour with a two-hour minimum if you use a card, it's a bit expensive.
In summary, the property we rented was very nice and we found some great restaurants but town policies seem to be geared more toward controlling Spring-breakers than encouraging retirees looking for quiet, slow season spots to spend their cash.
Five stars for the rental property and restaurants. Three stars for the town.