I like 2 strokes myself. A lot of hype with the 4 strokes in my opinion. While they both have advantages it should ultimately depend on it's use.
If you are taking the engine off and on your boat constantly, go 2 stroke. Lighter to lift and carry. Also an advantage is better power to weight ratio. 4 strokes are heavier and it's taking away efficentcy. I like the 2 stroke throttle responce and quick planing ability.
On the other side of the coin a 4 stroke may be better on fuel. Here it will depend on how much use it will actually get.
To each his own, thats why they make both.