I never mentioned quality, you're just throwing words around. I said they're incomparable due to their vast differences, as they're not even in the same genre of videogames. I respect what Miyamoto says, and I believe you, but there's an obvious distinction between Mario's platforming games and all the others, despite Miyamoto's definition of "canon". People know what someone is talking about when they say the "main" Mario games.
Also, Geno isn't popular; he's "popular" to a very particular group of people.
Except Main is still an incorrect terminology now that every game happens. We call them platformers, since even games like Galaxy 2 aren't main games according to Word of God. It's a useless term to throw around. Just call them by the genre.
And again, the genre doesn't matter because not everybody even likes the Platformers. Or the Parties. And so on. Most of the Non-Platformers are extremely popular too.
And yeah, Geno is popular. To a lot of people besides a particular group. He's surprisingly well known, even more than he used to be, especially thanks to Super Mario RPG coming out on the VC.
And I can certainly compare the quality of any game to another regardless of genre in the Mario series. Since the key point is how well the gameplay is overall. I didn't find any of the Galaxy games to have super outstanding gameplay. Same with the Golf and Tennis games. I'd put them on the same level of good overall.
Either way, Toad is still the last main hero to not be playable in Smash, has tons of moveset capabilities, and would be an excellent addition. I used to make that same argument you did. But then I learned it was based upon speculation and not any hard facts. And the facts state that Toad is a main character in a whole lot of games. Now, this would make sense if we were talking about Waluigi, who's an important villain in one game, and a mediocre villain in another, and often a random guy in the rest. Then again, he does get quite a lot of love by Nintendo and Fans.
Moving onto more interesting conversation;
I want to see Bowser's Castle as is. Two different versions for each one. Something like the battleships for the 3DS version, and perhaps something more like Mario 64/Mario Kart 64 for the Wii U version. Also, some kind of Dr. Mario stage.