Evan, I think I fully agree with your on the library part. I think one of the reasons I rank Game Cube so high and remember it so favorably is because between GBA-GC connectivity, e-Reader, and GameBoy Player, it had the most diverse and interesting software library. Sure most of the GBA titles were just ports or remakes of SNES games or derived from SNES games, but with so many people ranking the SNES in the top spot, not just among Nintendo consoles but overall too, I think there is a lot to be said of having those SNES-type games. I think that is why Wii and to some extend Wii U were so lacking, Nintendo is stuck on the NES-days and all their nostalgia is reserved trying to recreate those years, they forget that despite the battle with Sega, which in the end they pretty much won, they had some of their best, most memorable games ever released for that machine.
I think that is why people like Ian, no offense buddy but you are the most vocal it seems, hold onto the SNES era so fondly whereas maybe those years aren't as favorable for Nintendo because of Sega, Atari, Sony, Neo Geo, etc. I don't know why I fell in love with Game Cube maybe it was right place, right time, or maybe it was just it hit all the right notes following the major disappointment of N64 that forced me to also get a Playstation.
I think that is why Wii U e-shop doesn't do much for me, sure there are real SNES games on Virtual Console but none of the 2d made for e-shop games have that Super NES 16-bit magic they are all trying desperately to recreate the archaic, dark days of the 8-bit NES era. I think that is where Playstation is stronger, they are better at embracing change but also know what parts of their line up is nostalgic for their audience, hence why they embrace the old PS1 era as it was the closest to what we got with SNES and why I think some of the PSN digital games try harder to recreate that era. I think they both play on emotions really well it's just for me, NES takes me to my toddler years, SNES takes me to my fun years, PS1 takes me to the years my hormones were trying to tell me to stop playing video games and with GameCube I was finally an adult who could just appreciate games as what they were.
Maybe that is what matters, age more than anything? Seems like younger people prefer newer consoles or the one they played when they were the age I was when SNES was big. Maybe it is just something about those years.
As far as actual library goes, I love Super Mario 3D World and DKC Tropical Freeze maybe because they do sort of remind me of the 16 bit era more than recent offerings? I guess getting back to the whole Wii U 3DS being redundant but GC and GBA being complimentary seems to me it has to do with the games on GBA actually adding something to the GC library where with 3DS and Wii U you aren't getting anything really better or different just a bigger screen and better joysticks I suppose?