There were three aspects of submarine warfare that first attracted me to sub games.
1. Submarines stalk their targets and then they lay in wait. That aspect of gaming appeals to me. That is also why I like sniper games. The requirement to plan an attack instead of going in guns-a-blazin I like in games. The concept of being, from an armament standpoint the underdog appeals to me.
2. In the context of submarine games, the decisions are made by one person, in this case the player. In sub games the player has to do a lot of tactical and strategic planning.
3. Sub games are slow in nature. There is plenty of time to think things through. This help players like me who have very small brains. This may also explain why I suck at flight sims but do ok with Helo sims.
And lastly, I always had an interest in submarine history.
Oh I forgot the most important reason. Chicks.
I was told that chicks dig guys that play submarine games.
Perhaps I was misinformed.