How often do you reboot your laptop?
Well, for me, I run Linux (Kubuntu 12.04), and I usually do it when a new kernel security update is released. And put it on sleep otherwise.
This means I can go for a month and a half without rebooting.
Here is a recent example, output from the "uptime" command:
14:31:46 up 45 days, 2:10, 7 users, load average: 1.45, 1.29, 1.28