At this point, there are so many games that quality over quantity is definitely preferable. If there are only a small number of games that are truly "great," this would be problematic, because if even a few of the best games aren't of a genre you prefer, then you're out of luck. It's the problem I have with the Wii U. Sure, it has some really great games, but the fact that a large portion of those great games don't interest me (of the great games, I have no interest in Smash Bros., Bayonetta 2, Wonderful 101, Donkey Kong Country: Tropical Freeze, Super Mario Bros. U, Super Mario Maker, or Super Mario 3D World and only marginal interest in Mario Kart 8, Splatoon, and Xenoblade), the Wii U is a tough sell to me. So, I think there needs to be some balance. But since there is a large quantity of games in total, having access to just the best isn't going to be terribly problematic.

Easily the top 20 ...

Maybe even the top 10 but probably not the top 5 since it's well below the attach rate of the most successful home consoles ...

In the end it depends, if it were about ratings then it means nothing to me but if it were my personal picks then I'm fine with it ...

80 games is too much. I'd take the top 20. I prefer both the smaller quantity and the quality it offers.

easy question, quality over quantity.  the question is extremely easy if you're talking purely 'top 20' versus 'bottom 80' in terms of ratings/quality because generally speaking great indies or great big Triple A games are going to have honest ratings. So you'd get a Bioshock and/or something like smaller like a Binding of Issac sort of game

now if you were to change your question to 'top 20 best selling games' versus the next '80 best sellers underneath' then that becomes a very interesting question for the simple fact that sometimes awesome games sell well and sometimes less awesome games also sell well (COD). I think a good sales versus bad sales quality vs quantity question would be more interesting because great sales doesn't necessarily gurantee anything

top 20 ver next 80 is just too easy, you would be sacraficing playing all time classics if you didn't pick top 20

Top 20 for sure. It is like picking 20 Console games or 80 Mobile Games in quality.