Psychonauts! I was in love with that game from the second I played it. I was excited when I got to the ending, because it was a cliff hanger. I cried when I found out there wouldn't be a sequel.
Also I loved Spyro (The PS1 games were the best), and Crash. Again, I cried at the end of the Spyro series. And I was very displeased at how they handled the Crash Bandicoot series. The first few games were pretty good, and then they just made these weird obscure racing games.. And they tried to get back to the platforming element later, but the damage was already done.
DID YOU KNOW THERE WAS SUPPOSED TO BE A SYPRO: LEGEND OF THE DRAGON MOVIE?!?! IT GOT CANCELED. I WAS SO. MAD.