When my Husband brought up this topic to me, I asked if I could respond as we lived in South Florida for 8 years.
There arent too many mountain shots in Florida I agree, but it makes up for it with the coastal scenes ten fold. Within a days drive, you can be in the Keys or in the Everglades National Park, where you have unlimited photo opp's with the alligators, migrating birds and waterlife.
Snorkeling in the Keys is World Class, and the West Coast of Florida is loaded with great locations. There are so many different historic locations in the Northern sections of the state and when you get into the Pan-Handle, the rivers become fantastic for photography. The Pan-Handle of Florida is really like a completely different state and will impress the heck out of you. When we first traveled up there to kayak some of the many rivers the area has avaliable, we couldnt believe we were in the same state.
When we used to live down in West Palm Beach, we would have killed for a Digital Camera. Back then only Film was avaliable, and we were really into the storms and lightening shots. We wasted so many rolls of film to just get a few great shots. The state of Florida has more lightening touch downs then all the other states combined. When the hurricane season blows in, the storms can get really nasty and make for some great shore line images. Everyone always wants those perfect blue skies, but a nasty storm will give you much more of an impact then a boring sunset on a clear day will.
Just because all the magazines cater towards Mountains and their photo opportunites, dont get discouraged with the flat geography of the Sunshine State. It has plenty to offer.