I think the Mass Effect games were very flashy but the gameplay elements were pretty shallow. It felt like all the dialog led to the same outcomes, you could be a paragon and give all the "good" replies to conversation or give all the edgy renegade replies and the story would proceed the same way. It kind of felt like it gave you the illusion of choice without actually giving you any real choice. I think it was endemic to the 2000's era RPG's Fallout 4 had exactly the same problem.

The combat wasn't very engaging either it was a boring feeling cover shooter. None of your character abilities or gear or anything seemed to have much of an effect.