All Around: An excellent all purpose choice. The longer the board the faster vs a shorter board which would be more manuverable. The wider the more stable vs a narrower board which more be more carveable.
Crusier: Generally better for choppy water and has a more pronounce bow for slicing through waves.
Entry Level: Good for introducing your friends to the sport.
Inflatable: A very nice board that packs back down to a knapsack, intended for touring.