I liked DKC better because there was 2p coop, and it was more challanging than YI.

You think so? I think YI is way more difficult... although I realised today that DKC is challenging too, I thought that I could quickly play through some of the levels I loved, but that ate up more of my time than expected

DKC all the way!!! the first one

 Me too !

I definitely don't think its exclusive to Miyamot's Mario Games, Sonic's pretty awesome too as a pure platformer (on the genesis at least) and you can't forget about Megaman or Megaman X.  Super Metroid is also my favorite 2-D jumping oriented game of all time, but I don't know if you would call that platforming or action/adventure?

I liked the style of YI more and the many boss battles (2 a world) were a lot of fun.  Both series are full of secrets and collectibles, but I think that on a whole there is constantly more to collect/do in YI between the 20 red coins and the 4 flowers than in DKC where there are longer stretches of more straightforward platforming.  Not that straightforward platforming is bad.  YI also had a lot of silly power-ups such as melons, vehicle transformations, and super baby mario whereas DKC has animals, so I think it comes down to your personal preference power-up wise.  Challenge-wise YI had unlockable extra-hard stages and DKC2 and DKC 3 did as well? (I don't quite remember but I think that's right.) 

Yoshis Island is the bomb, I beat it on SNES a few months back. I remember DKC being pretty short overall, but a good game none the less. Nintendo pushed DKC way harder on the AMerican public. I remember getting a free VHS from Nintendo Power when I was a kid, and I was sold on the graphics. That game was good but I forgot that gameplay > graphics (I forgot I played rise of the robots). I think I prefer YI cause it has some really chalenging points if you want to get %100 on all the boards.

DKC's easier than YI, because while I only got 100% in YI, I got 101% in DKC!

donkey kong country made me cry when i played it for the first time. it was beautiful, and my fave game for the snes.

I think the DKC games have aged considerably less well than Yoshi's Island. I can understand where the people are coming from who claim that Yoshi's Island is the greatest ever 2D platformer. It's a fantastic game, Poochy be damned!

Yoshi's Island was a good game with some interesting ideas. Personally, it was too colorful and kiddie and Super Mario World was better.

DKC, DKC2, and DKC3 were all better than Yoshi's Island in sound, graphics, and humor. They also made for better 2 player games.

The actual characters were best in DKC2 but the graphic reached their peak in DKC3.

I played DKC on GBA and DKC2 on SNES within the last 6 months. I have not played Yoshi's Island since the mid-90s and never intend to play it again.

So, if Miyamoto attributed the DKC series sales besting Yoshi's Island to just graphics alone, he was wrong. Graphics, sound, multiplayer, humor, and non-kiddieness were all better on the DKC games.

I never played a Rare game on N64 (I never owned the system) but 4 of my top 10 (DKC, DKC2, DKC3, KI) SNES games were made by Rare (which is more than I can say of Nintendo developed games). Rare used to be one of the highest quality developers in the world.