Favourite games -v- most re-played games

I have been recently thinking about the games I usually say are my favourite, as in my "top 5 RPGs" or whatever, and thinking about how this list overlaps with the games that I have played again and again.

What I have noticed is the lists don't really overlap.

So, my favourite game and RPG is probably FFVII, but in actual fact, I actually haven't played this game through in maybe 15 years now. Is it really the game that I should say is the "greatest"? Is that really what I think, or am I really saying "the game I have the greatest nostalgia for is FFVII"?

I don't think it is all about nostalgia though, because I only played MGS through for the first time 5 years ago, and I honestly think that that game ranks right up there in my top list of games, and in fact, I have only played it through once.

Is this honest? Do we need to have played a game many times for it to be in our top list? When it comes to films, all the films I like the most will be films I have chosen to watch quite a number of times... but with games, maybe it isn't the case.

Perhaps this is down to the amount of time it takes to complete a game, the investment, compared to a film. But even with my favourite books, I have read them a number of times, though probably not all of them....

And then there is the really weird case of games that sucked hours and hours away from my life, but don't even appear on my tops lists. RPGs that I put way down the list but which I played every last bit of juice from them, and at the time must have really enjoyed them or got something from them.... FFVIII for example- I played that to death over a full year, or Age of Empires, or Street Fighter Alpha 3, or Fifa 97, or Altered Beast, all of these I played loads, more certainly than MGS yet MGS ranks above them for sure in my estimation.