Submissive is definitely not a word that I would use for Dominicanas. Women are definitely willing to make hard decisions to protect their family and themselves. They may appear to be submissive as long as the good times are flowing, but if that spigot turns off, watch out.
The men definitely fit right in with other Latin men. They can range from hardworking family man to pathological gamers, players, and liars with everything in between.
I've definitely run into more people here that, from my perspective, have difficulty with the truth and their reality is very malleable to the point that I'm not sure they even know the truth. Even the concept of truth may be completely lost on some people. A liar implies an intent to deceive which is often not the case. I think most European or North American countries would diagnose such people as having a personality disorder, but here we just refer to it as Dominican.
As a whole, I wouldn't describe Dominicans as monogamous. A definite "mixed" strategy that gives randy bird species some serious competition.
I've also met some of the most genuine, authentic people that I've had to pleasure to get to know. It's a wider spectrum than you'd find in the USA.
There, that should clear things up.