im going to null my vote since it really depends for me. school work, free time, sports practices and games, etc... It also depends on the mood im in. However, I think my record was watching all the episodes of GSD (excluding recap episodes and including Final Plu) within one day, but my longest record was taking over a month to finish all of Karin from episode 1. So even though the poll says 24-26 episode series, the time varies for me for each anime, not depending on whether it is long or short, but rather only based on the time I have.