I just started playing League of Legends about 6 months ago, and my first (and still favorite) champion to play is Corki.
Being a new player, I started with the ADC role so I could practice farming minions. Corki was one of the free champions for the first week I played, so I got him with my initial IP. I love his abilities. His entire kit fits my play style. The Q Phosphorus bomb is a nice little poke, has splash for quick farming, and can check bushes. Valkyrie on W is the perfect escape/closing move, which can jump most of the walls in the game. The E Gatling Gun is great for allins and doing a ton of damage. However, the best move on Corki is his ultimate: Missile Barrage. I love poking and having sustained damage, and Corki's R couldn't be better. It's great if you're behind, because you can farm the minions that are too far away to grab safely. It's also good for harass; I can prevent recalls under tower.
Corki is my favorite champion because he helped me learn the game. I've been a Starcraft 2 player since the Beta, and it was my game of choice. 4-5 hours a night for three years, got involved with a podcast called "Starcast: the Starcraft Podcast", and becamse a high-Masters Zerg player. However, as the game finally became stale to me, I needed a replacement game. I was skeptical about League of Legends, but Corki grabbed my heart with his amazing mustache and enthusiastic personality (no homo :P). I now play LoL daily about 5 or so hours, and I'm having an absolute blast.
I would love to win this RP, because I am still new to the game, and it would help boost my runepages/champions/etc. Also, this is an awesome forum! I've been looking for a new community.