Jack Nicholson's 4 syllables (1 + 3) hit the Hollywood sweet spot.
Jack and Nicholson have a workable rhythm — close to the perfect punch.
Jack Nicholson's softer consonants cost it screen presence.
Jack Nicholson misses the alliteration hook that makes names stick.
A 5-letter gap between Jack and Nicholson throws off the poster balance.
Jack Nicholson has mostly familiar phonemes with a few tricky patterns.
Jack Nicholson's open vowels roll off the tongue — warm and screen-ready.