I guess I'm a special case as I watch movies for what they are. I try to enjoy all of them simply because they are different from the last one I watched..
I'm not a special,viewer per se, but instead rather oblivious to a film's gaming roots. I don't game, and normally have to be told a movie has been adapted from a game. So for me, a movie is a movie, and succeeds or fails on that merit.
If I'm going to lose interest in a movie, it usually happens at about the 40-45 minute mark. I presume this is because all the action and plot that are going to happen, are completed in this actual amount of time, during a 1 hour TV scripted drama.
Maybe 10 years ago was what I call, "the era of blonds with round faces". (Kirsten Dunst, & Julia Stiles to name just two). Now, if you can watch more than, (at most), 30 minutes of a movie with Julia Stiles(*) in the starring role, you needn't ever worry of dying from a gunshot wound to the head...
(*) However, Julia was great in the "Bourne" films.
Now the punchline: The making of any feature film, good or bad, is an accomplishment in and of itself, no mean feat indeed.
Point being: Many here shouldn't be such tough critics, (quoted poster excepted, of course), on something as complex an undertaking.
Financing is the first and biggest hurdle. Consider James Cameron's two huge hits; "Titanic", (everybody knows the boat sinks and has done so on film before), and "Avatar", (the biggest grossing film of all time (still?)), with a plot lifted from, (or parallel to) a teeny, tiny animated film, "Fern Gully".
"Avatar's" production costs have been estimated as high as a half billion dollars! And nobody can put up a plausible denial as to its visual excellence! A producer has to have established maximun "street cred", to garner funding like that. Or, as in the case of George Lukas with the "Starwars" franchise, put up the money yourself.
That said, films from comic books seen to fare much better in translation! "Thor", "Batman", "The Avengers", "X-Men" all make great movies. This has to force one to question whether a video game actually has the "literary credentials", to be adapted into a movie. The short answer is, it's possible that games don't even measure up to comic books as literary achievements.
I still think it's practically impossible to thoroughly please as gamer with a film which he or she plays, because it doesn't star them, whereas the game does.