The problem is with the question itself, you cant have just one favourite anime or a specific genre, cause most of them are great. Studios that make the animes differ in the design, for example, few of my all time favourites are aldnoah zero, guilty crown but also violet evergarden, fairy gone, kanata no astra. One cannot forget of the mighty Godtsua as well or kirito-kun. Funnily enough some time ago, a friend of mine asked me to give him a couple of shows to watch and while I was heavily restraining myself, I told him about 40 animes he should watch. Your question is not wrong of course and don’t take it the wrong way, but when you yourself enrich you anime list and perspective, you might see that every anime you have as completed will be your favourite. Sorry for the ramble. :)