I keep a TWSBI at my desk filled with Noodler's Heart of darkness since it is waterproof ink. I have a Parker Sonnett and a Lamy 2000 near at hand. I carry a TWSBI mini and various other pens at work. I like the Lamy Safaris and All Star for work pens too. I fill them with Noodler's Bernake Blue because it is very fast drying and works well on the cheap paper at work. I have several old Parkers and Sheaffers that I use on occasion. I really like the old Sheaffer Imperials.

Common sense and deodorant are a lot alike. People who need it the most don't use it.