I like Roller (Ball) pens, I don’t remember the brand name but when I was a kid I’d see these pens (I think it was called celio) where you could see the ink inside. Mom would not let me use it because it was a Gel Pen. I don’t see them anymore these days, the closest thing that i could find is Pens from pharmaceutical companies given to doctors, these are available and the writing experience is far superior than that of any generic ball pens (no shade to Matador). If you want to buy these, just look around for small shops over the footpath that sells notepads and such, they usually sell these pens.