Which ballpoint pen?

Just thought, what with all the boring polls that keep getting added to our glorious section of the nets (not mentioning mobile phones at all!), what ballpoint pen are you using?
I have, currently, a Staedtler Stick 430M and an Ikon Med, but I really believe you can’t beat the good old Bic Biro medium (which I find companies are reluctant to buy due to cost).
What is your favourite ballpoint pen? What was the worst ballpoint pen you every used? Do you have an amusing story involving a ballpoint pen? What pen did you use to sign for the wife/husband when you got married? Have you foiled a bank robbery using a ballpoint pen? Do you prefer fountain pens over ballpoint pens? Name a celebrity whose autograph you would really like to get using your ballpoint pen. Or who would you stab using a ballpoint pen. Anything at all.

What do you think? – Nermal