Re: Should I.......
Turning it off/on all the time causes wear to the bearings in the hard drive motor. Now, will that be a direct impact? Well, no, if you do it once a day (Night time to morning). Cuts your electricity bill.
All the other stuff is BS. Computers makes heat, but unless you have a rackmount server in your room with closed windows and door, it won't make a difference. I tried it.