Yeah, I never played the dynaverse stuff (wish I had, tbh), but I never even liked playing Romulans in the PvE/campaign. Romulan ships always seemed to have weaker shields, weaker disruptors, and the plasma torps were too unreliable. They were just as inaccurate as other torps, but had the added disadvantage of taking so long to recharge.
I'm torn as to whether I liked Fed or Klingon more. I liked the Fed campaign more (bigger battles), but the Klingon ships were cool.
I can't even remember the campaigns but the PvP was so good I remember some battles like it happened yesterday (tho over 5 years ago). The Klinks were always my first choice to play but thought I would try the romulans because I always liked the TOS warbird (BoP). I had hopes STO would become a suitable replacement for dynaverse, and I'm still waiting.