As so often it very much is a case of horses for courses.
When I fly my Condor I don't need a checklist as the standard mnemonics will do.
When flying something more complex with more systems or if I fly something new or infrequent a good checklist is important.
Ideally I make my own based on my personal preferences and the POH.
For those sessions which are only a one time off the POH will suffice.
FD