What makes Clinton such a good fit for Florida?
Doesn't Florida also have a large number of retirees from New York? I think she also had/has a lot of the Florida Democratic establishment support (Nelson, DWS, and even Meek and Hastings were Hillary supporters in 2008).
It'd be interesting to see how she does among Cubans, since that was arguably the voting bloc that delivered the state to Obama in 2012. If Cubans really are becoming more Democratic (especially younger ones), Florida will become a leans Democratic state before long. The senior citizen vote would be interesting to see as well seeing as how the elderly usually go GOP. However, I don't think age is the sole factor to explain why she's a good fit for the state.