Please don't bash things that I like...
I'm not bashing.
And I'm not targeting that to just you, I'm talking about EVERYONE here who favors Luigi over Mario like some corrupt, biased, extreme politician.
Originally I played as Luigi because I was forced to. My brother played as Mario, I as Luigi. I didn't complain, I liked his green clothing. Same story with Mario Bros. I never played as him in SMB2, no, almost the whole time I played that game I played as Peach. My brother and I didn't own the NES version of SMB3, and in Super Mario World my brother and I played separate files, so I was never "Player 2" after that point.
I honestly didn't notice the fact that Luigi wasn't in Super Mario 64 because I didn't care. The game was fun enough for me to not notice. It also really scares me how there are still people who believe he just might be in the game somewhere. When I finally DID notice, I asked my brother why, and he gave me a fairly simple, yet intelligent answer: "Do you REALLY need him for this game?" He wasn't in the game because he simply wasn't needed. Same with Sunshine. The only reason he was in Galaxy was mere fanservicing, I'm sure the game would've still done great had he been absent and unplayable.
He's good in games like Brawl and Kart and Party and any other game that is generally played with friends rather than alone, but I don't see much use in him by myself. I apologize for being blunt, but, he remains the same in my eyes as he did back when I started playing video games. Luigi is PLAYER 2.