I did enjoy orlando paintballs indoor fields which FTP didnt have BUT FTP is much cleaner, and seems to have a more friendly staff.
Full Throttle is definately a 10 in my book. Very friendly people, great fields, and theres always a good crowd there to play with. I started there as a complete amature, and have learned a great deal from other players and staff. They have nicely layed out large fields wich can hold large numbers of players. They hae an amazing Speedball Field which i enjoy playing on.
the only downside to FTP is its hard to find the first time you go to play. The roads arent marked very well. Buncha dirt roads.