For myself, it is the 688(i) fast attack boat. I don't know what it is, perhaps I feel comfortable with it because of all the hours I spent in it in the original 688(i) Hunter Killer game. When I drive this platform in this sim, it is like driving an old reliable car where you know where everything is and what every sound is emanating from.
I also like the look of the panel stations, straightforward, nononsense and superbly functional. There is something about the green waterfall display in the sonar station that just does it for me.

I can spend hours staring at that display...