This is not a guide on HOW to play Caitlyn. But it should tell you how to have CONSISTENTLY good and if play permits AWESOME results. Have fun and comment if you rock, and if not - tell me why in your oppinion so I can address concerns, help, or perfect the build ;-)

I've been seeing a lot of crit Caitylns and they suck. They've got themselves some ArPen and seem pretty rapey in the first few minutes of the game. So what. Later on, they just suck.
What I've tried to create is a double solution. 2 build that lead to the same results but account for a certain amount of suckiness early game without sacrificing mid or late. The A build is for pure awesomeness and the B build for a little bit of suck. NOTE: this build lives off of Clarity and Alacrity Seals, so you better be having them if you want to rock.

Also: at any time you could be able to afford a B.F. Sword.... BUY IT!

Also the other good advice would be: decide which patch you go /A/B/ after you buy the Berserker. I you got around 1000 after that, don't go dagger but keep farming for the B.F. IT WILL PAY OFF! Should you die in the meantime and could not complete the B.F. even thoug it looked good. Go for dagger and Pickaxe. If you still do well, you can always follow the BUY IT! advice of the B.F. Sword now.

EDIT: I've edited both build solutions after some more testing. Also after the new patch, the Sword+Health Potion build will see a huge increase. I can tell ;-)