Nope! Quickest support article ever.
Our account system is there to help customers when and if they need it. If you're happy ordering as you need it and don't care about re-entering addresses and remembering printer models then great, just add to your basket and go to the checkout as normal.
You get the same pricing and delivery options as someone who is logged in to their account, all you miss out on is order history and faster re-ordering.