Just a little thing that irks me... whenever I start an application, it always starts in the top left corner. Is there any way to change this so it remembers where it was last time, or maybe start in the center?

system settings -> window behavior -> Window Behavior -> Advanced -> placement -> your choice

@envalin: You can set a different position and size for each application if you choose. Just right-click on the title bar of the application, > Advanced > Special Application Settings. Drag the window to the size and position you want, then, in the Geometry tab, set Size and Position to Remember. Next time it will open up just where you had it.