I initially thought this was a simple but strange question. However, it is a great question to discuss with fellow members. We all talk about our 'good' holes, some want to talk about 'signature' holes (I assume they mean memorable holes). But what about our 'not as good as the rest' holes.
I then started to compare my course's 'not as good holes' with those of nearby clubs. Thats also interesting and illuminating!

When deciding which was my 'not as good as the rest', I became confused. There are two sharp dog-leg par fives which, for the average golfer, comprise a miserable drive (too tight), probably a 100 yard second shot (to avoid the trees) then a third to a green surrounded by bunkers, from about 150 yards. However, for a single-figure player, the holes can be quite good - a testing two shotter. Note that the original design was a two-shotter, but they were lengthened by some 50 yards to become a par 5 (or worse for the lesser player).
So, I changed my mind, to a shorter par 4 hole with excessive trees, limited real choices for all players, and the green generally uninteresting.
The actual hole is unimportant here, the thought process is the key outcome. The question is an excellent one when identifying the courses 'weaknesses'. A great 'brainstorm' assister.