Knuckles is definitely my favorite sonic character. I first saw him in Sonic & Knuckles as a kid, and I liked playing as Knuckles more than I liked playing as Sonic, probably because he came second in the title, and two was my favorite number. Also, I thought that he looked really cool and I liked how he could glide. When I played Sonic Adventure DX later on, I was really excited to see that you could play as Knuckles, but was disappointed that he wasn't unlocked from the start. When I did get to play as him though, I admired him because he guarded the master emerald all alone on Angel Island, and he was pretty low energy, but he was also tough (and has a nice voice).