QDM
You're treading on very dodgy ground there mate. Aircraft manufacturers/operators compile checklists for a very good reason. One very good reason is that one aircraft can be very similar to another one but can have totally different systems ie Piper Cherokee family. I would wager that EVERY pilot who's ever landed wheels up wished he'd stuck to a check list - no matter how simple or noddy.
Contrary to what you might think about checklists being a hinderance to your flying, used correctly and they free up a lot of capacity. The reason why it's always a good idea to commit certain parts of the checklist to memory (engine fire/failure) is that you don't have to think about what you are doing, you do it automatically whilst leaving all that unused capacity to deal with FLYING THE AIRCRAFT. Another reason is that it stops those embarrassing situations like trying to taxi clear of the runway with the wheels tucked neatly in the wells.
Give it a bit more thought next time.