Only things I've run in to that need an occasional reboot are cable company supplied modems and AppleTVs.

Use Motorola Surfboard modems when you can. I have one in my house and have never had to reboot it, when I have had an internet issue it has always been a service outage in my area.

AppleTvs.. no matter how I configure them, static, dhcp, reserved IP from router, go to sleep, don't go to sleep.. they eventually lock up and need a reboot.