Wait, wait. Yes I generally ignore "professional" reviews in the favour of user opinion, I'm not alone in that regard.
Didn't have the marketing budget? It was an EA game! It had been hailed as the saviour of PC gaming for years prior to release, it was hardly underground.
Yes I own it and have completed it, I don't see what difficulty level has to do with it
The problem I have with it is the story was pretty poor, the characters terrible, the pacing poor (as with Far Cry the game takes a distinct down turn in the last third) The pro's were obviously the stunning visuals, some fairly interesting A.I. and one of the most 'alien' alien levels I've seen in gaming (most people seem to think otherwise but I loved that level)
You say "forget about the story" but in a single player first person shooter the story is a massive part of the gameplay.
Not sure where I said Mass Effect games have a rich gameplay, mind quoting where I said that?