I have never seen the Wing Commander movie and never really wanted to. Knowing what I do of it, though, I wouldn't let that color my perception of the game series, which is incredibly remarkable.
I think Wing Commander games do have a bit of a steep learning curve, as games go. In a sense, that's kind of cool to me, though. It makes them feel more life-like. Just like we have to learn to effectively drive cars, there is some effort put into learning to fly space fighters, and each fighter/bomber class you fly feels different, which is really cool. For example, a Hornet light-fighter is going to be notably different from a Scimitar medium fighter. There is a lot of care put into these games, even in the subtle details, and it shows. The cool thing about Wing Commander is it keeps things interesting for us while we're learning, as it introduces intriguing characters and the story unfolds.
I also have to applaud the missions you go on. When I recently replayed the first game, I was surprised that you never do the same thing twice. Out of all those missions (or sorties, as they're called), there aren't any redundant missions. They all involve shooting down or escorting something, but there is always a new twist that makes them different. For a game as old as Wing Commander 1 is (1990), I am really blown away at how detailed, mature, and intricate it is. It gets you pretty personally involved in the game. When my Wingman is in trouble, I do get worried, because s/he's an actual character that can go away for good, and I like practically all the characters in the game. It sucks when they die, and it's not very hard to get killed out there : /
Just the other day, after as long as I'd been playing this, an enemy fighter practically ruined me in like three seconds with a series of direct blows (a heavy fighter with really powerful guns, I was flying a medium fighter), so my wingman and I just turned around back to the carrier and failed the mission. Better that than dying. Unfortunately, it was a very important mission and caused the story to take a bad turn, but that's just one of the things that makes the game so great.