Hard Cover or Paperback?

Right now, I'm re reading Spell of the Highlander. I read at least an hour before I go to bed. Depending on what I'm doing at break (going to the cafeteria, visiting a co worker) I'll read at work too. My book fits neatly in my purse. It's easy to carry as I walk my route at work.

My friend just loaned me Dark Side of the Moon. As you know it's hardback. It doesn't fit in my purse. Honestly, I don't feel like lugging it around. It has nothing to do with the cover *Looks at Holly. I mean I'm walking around with Spell for crying out loud!* Some hardbacks are heavy (Harry Potter). I can't hide them when my supervisor comes walking down the aisle when I really should be on the phones. (Yeah almost got caught while reading Angels and Demons a few times)

I don't like Hardbacks. They are more expensive, sometimes heavy, huge (mass paperback is just the perfect size) and the jacket covers annoy me. They slide and slip.

Usually when a book comes out in hardback, I'll borrow it from a friend and just wait to buy it in paperback. Except Karen Marie Moning. I will spend money on her hardback books. Just cause, I need it. I need to know what happens and I need it for my collection. However, once the paperback comes out, I'll buy it and the hardback goes into the UBS pile.

So, which do you prefer? Hardback or paperback?