I draw the line on ball points. My dailies are the Mont Blanc and Colibri rollers on the left. I like the Colibri because I can fit a modern Pilot G2 gel refill...I like the way the ink flows on those. When I'm on the move I have a number of Cross pens that fit nicely in a shirt or in the Day planner and are easier to replace if lost or taken.
I also have my Grandfathers every day Scheaffers fountains that he used in the 1940's.