These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Henry IV Part 1
Alternative Character Interpretation: Is Falstaff a sad, old, cowardly man looking at the Crown Prince as a meal ticket, or is he an indefatigable mound of life and bombast who genuinely loves his Hal like a son? Is Hal a defiant, young hedonist living out the last flames of irresponsible youth before the weight of the crown comes crashing down on him, or is he a cold, calculating politician using the denizens of Eastcheap to craft his public image so he can appear so much finer in his reformation? Do Hal and Falstaff even really like each other? There are so many ways to play both characters. Compare the scene where Hal and Falstaff practice Hal's future encounter with his father the king in the 2012 BBC production and the 2010 Globe Theatre production.
Hotspur as well. It's easy to forget, but there was a time where every stage actor wanted to play him, rather than Falstaff.
Fan Dumb: In the eighteen-hundreds, someone decided that America needed the birds of Shakespeare. Thank heaven he didn't get as far as the cuckoo, but he remembered the line about teaching a starling to say nothing but "Mortimer" and common starlings are common as dirt in the States, and a major aggravation to bluebird and purple martin landlords.