The time.. Well - I've been on sickleave for a year almost now, so if I don't have too much pain I do it.
In february when I tried doing lectures I'd do it in the evening to unwind after a long day of lectures instead of just watching tv.
It's a way for me to keep my brain active with all the counting and a way of not going crazy just being at home - and the bonus is that a lot of people in my family appreciate them as gifts - otherwise I'd have a house full of bells and so on hehe