very fun sketchbook as always man alot of imagination i would love to see you develop your observational skills so you can soak up life better in your imagination stuff, i think its time to move past the basic shapes and strive for biggeer things for a while, i loved to see those speed paints, you should stop thinking of color and start thinking of value so you can resolve your issue of saturating your colours, i encourage you to back up your skills with some kowledge.
go over to www.gurneyjourney.blogspot.mx/ every page is gold.
havig a style for doing stuff from head is great but the other side of things must be a good ammount of skill to study subjects from life, also some perspective could do you wonders, specially with the backgrounds.
and you can also see some production artwork so you can see how the animation masters did their model sheet and how to let a character come to life through emotion and character thats over to either www.livlily.blogspot.com or www.floobynooby.blogspot.mx/
i hope to see you keep on having fun and experimenting with your comics i just love them im a big ass pokemon fan after all ^^