Every home in Florida should have a full gutter system to drain water off the roof and direct it away from the house. In a two inch rain, a 2500sq.ft. house will shed more than 3100 gallons of water!!
Without gutters the soil around a house becomes saturated, which will lead to errosion, uneven settlment of the foundation causing cracks, deterioration of the termidicide barrier, and the wet soil invites termites. Plus water falling of a roof will saturate the walls of a house and deteriorate the paint.
Most "spec" homes do not have gutter because they cost the builder money, and most buyer are not aware of their importance or cost to intall after buying.
Gutter also need proper leaders and splash blocks to direct the rain water at least 6 feet away from the foundation, 12 feet is better.