Well, as much work as i spent on making the 3rd flotilla (see "La Rochelle anyone?" thread in mod forum) , i decided i needed to play it. That means using an VIIC.
Besides, its not like ALL i've ever done is IX boats. I used type7's exclusivly for the first few months. I dont know how, or why i moved to type 9's, it was just someting that happened. You should try it sometime.
edit: infact, i highly recommend an IXboat in 1940, early 41 for night surface attacks against convoys. The carnage is awesome!