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.
Crowning Moment of Funny: Oh so many, but one of the funniest is Ayana's 'Dainingen Giri' where she picks Hayate up and swings her around like a big blade.
Crowning Music of Awesome: Although just a manga (and therefore no actual sound can be heard by the reader), a certain Student Council President won't defeat an opponent of hers in a certain battle until the song in the background is at its climax.
Les Yay: A lot (mostly between shinyuu), though Jun is the only one with an explicit interest in the female form. ...A very, very explicit interest.