To be more precise:
"Opinions are like testicles. You kick them hard enough, it doesn't matter how many you've got." - Varric
On topic: Best game in history is definietly Drakan: Order of the Flame. Oldie but goldie. I have played it through 200+ times by now. It was my first real game as a kid and it's still closer to my heart than anything else. Now that game made dragons awesome.
Sounds more like Nostalgia than actual quality to me. Not that there's anything wrong with that.
I don't really agree with Skyrim being Number2 on the list either though. Portal is at least justfiable at Number 1, but Skyrim is too broken and too incoherent to be in the top 5, maybe even the top 10, not that I'm not glad it ranks so high.
I actually had a long discussion with a friend about how Skyrim isn't better than Morrowind at least. It gets a little confusing for those who didn't play Morrowind against its contemporary Market. Basically, no Elder Scrolls game has had stellar gameplay in individual areas. It's certainly got better with time, and the playability and engagement of action in Skyrim is truly the best it's ever been, but no world has had the same level of design integrity since Morrowind. There was so much to discover, so much to learn, the combat and quests became secondary, if not tirtiary. It became about exploring Morrowind (Specifically Vvardenfell Island) more than anything. What's more is that the game was written and designed to facilitate this. Pretty much all the quests lacked a sense of urgency, which in any other context would be a bad thing, but because you never felt the weight of world-crushing consequence on your shoulders, you could disconnect yourself from the
game and get into the
world.
In short, Morrowind did what Elder Scrolls games are supposed to do, it let you carve your own place in the game world, but with enough tangible depth that brought it close enough to feel connected to. (Unlike Daggerfall).