 If you liked
Hayate no Gotoku!!
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 ...then you might like
Baka to Test to Shoukanjuu
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Both are hilarious animes that have a lot of references to other pieces.
Also find that the characters are quite similar:
Hina and Minami are both Tsundere
Hayate and Akihisa are both dense as lead
Segawa and Aiko are both teasers
Also both shows like to put their main protagonist into questionable outfits.