When the first game came out, I wanted to play it because I was a big fan of Street Fighter and Marvel VS Capcom. I knew all the Mario characters, Link, Fox, and the Pokemon (Hadn't played it yet, but it was everywhere in the late 90s). The idea of a fighting game with Nintendo characters was awesome, and I was a huge fan of the Mario and Zelda series, as well as Star Fox 64.
Today, I'm a major Nintendo fan, and these are their franchises that I care about:
* Super Mario (Loved 3D Land, just got Superstar Saga on the Wii U VC, just picked up Bowser's Inside Story, and plan to playthrough 3D World when my college semester ends.)
* The Legend of Zelda (I own Zelda NES, LTTP, LA, OOT3D, MM, OOS, OOA, TWW, TP, SS, and ALBW. One of my all time favorite video game franchises, and I plan to pick up Hyrule Warriors and Zelda Wii U, and whatever other games are released in the series.)
*Metroid (Beat Zero Mission, Fusion, Prime, Super, and Other M. I own Return of Samus, the Prime trilogy, Super, and Other M. Planning to get Fusion on Wii U VC and beat Prime 3.)
*Kirby (Picked up Return to Dreamland earlier in the year and got Triple Deluxe a few weeks ago. Also own the Dream Collection and Epic Yarn.)
* Star Fox (One of my all time favorite video game franchises, I've owned and beat every game in the series except the SNES one. Will pick up a new release day 1)
* Pokemon (Fell out of the series with Gen 3, but got back into the series with Gen 5. Thought Gens 5 & 6 were awesome and will get Omega Ruby or Alpha Sapphire.)
* F-Zero (I like the SNES version and X. I owned GX and liked it. Plan to get a new release if it ever comes out.)
* Fire Emblem (Awakening and Path of Radiance were awesome. Plan to get any VC releases and new releases in the future.)
* Kid Icarus (Loved the original and Uprising. Plan to get new releases in the future.)
* Punch-Out (Own all three console games.)
* Super Smash Bros. (Obviously.)
There's also a few one-off or lesser franchises that I like such as Rolling Western, Wonderful 101, and Xenoblade.