Rather depends on what your future will hold.
If you're only every going to be flying a basic SEP, then fine forget the printed check and memorise the few checks there are, as most people do if they're only ever going to fly one type.
However, if you're likely to jump from one aircraft to another, say VP prop which needs checking pre-flight, fuel injected engine which is a completely different starting technique to carb, or if you're looking to go to airlines in the future then I would use the checklist every flight purely to keep the checklist using skills current so when you need it, you're not losing your place all the time or having no idea what you're actually checking for.
Also, lets say you only ever fly a PA28. You memorise the checks now, and are flying every few days, it works great. Once you have a month or two without flying (which you definitely will at some point) you come back and realise you're rusty as hell and need the checklist. So even if you memorise the checks, I would still have the list there and follow it through.