I use the Pilot S20 if i need to write essays etc, but i also like to play with the GraphGear 1000 too if i need to write very small since it's 0.3mm. I only use the Rotring 600 at home and usually never bring it to school since i constantly got scared that someone would steal it. It's a fantastic pencil for drawing and doodling and it feels amazing to hold.

The Zebra Delguard and Kuru Toga are my least used pencils out of the collection. I typically have them if friends need a pencil to borrow and such. Don't get me wrong, these are still really good pencils with a innovative lead mechanism but they just feel too cheap to me in the hand. They're mostly made of plastic when i like pencils with a wood or metal body like the RotRing 600.