What computer model do you have?
As with evey computer in my house, it's custom built by me.

What's your prefered type of computer?
Custom built. I like to build all my machines and wouldn't have it any other way.

What's the worst computer invented that you know of?
Hard to say. Each brand/generation/architecture has it's advantages and disadvantages.
I dislike most prebuilt computers, but Dell and Alienware are probably the brands I dislike the least, Compaq and e-machines I dislike the most.

What do you use your computer for (other than Eyesonff.com )?
Most everything electonic: University work, programming, writing and listening to music, gaming, internet and web, managing servers, etc...

As an estimated guess, how long are you usually on the computer and how many times a week?
My computer runs 24/7. I generally use it around 4 to 10 hours a day. I use it every day, no exceptions.