Total Recommendations: 4
Ecchi everywhere, comedy, maid-butler and those kind of relationships, what more do you want?
Butler-mistress relationship, anime tributes, ecchi moments, and parts that will make you laugh quite much. It should be noted that KimiAru has more comedy that comes from ecchi, while Hayate is mostly based on anime tributes. Also, Hayate is more age-friendly and has a far more powerful seiyuu cast.
A young male protagonist with a cute girl beside him, unidentifyable (did i just make up a new word?) action/fight scenes, fast-moving frames and story. Besides, Simon is clearly a copy of Naota. If you liked one, you will probably like the other.