Just remember that any deck can do extremely well. Just think about the last few SJCs. Original decks have been dominating. Demise OTK, DDT, Skull Lair even, all original, all winning. If monarchs or gadgets are the most commonly played decktype in a metagame, that just makes building original decks a lot more easier, seeing how you know what options should be considered for inclusion in the deck or not, and nobody will be expecting something new, and of course, there is the fun in that of surprising your opponent.
In the end, it's purely your choice of deck that you enjoy using. Nobody should influence that decision, or should give any insults etc or anything. Also, even with a deck such as Monarchs or Gadgets or a hybrid, it is still possible to be original, by including some personal touches.