Do you have specific pens that you choose to take with you on vacation? At home I tend towards c/c pens, because I like to change ink colors. However, I'm packing for vacation this week and I have my two TWSBI Diamond 540s and my VAC 700 topped up and ready to go. With these three at my side I have no fear of running out of ink on vacation. (Or possibly the rest of the month. The ink capacity of these pens is terrifying.) How about you?