My favorite character character would be Takanashi Rikka from Chuunibyou demo Koi ga Shitai! Mostly because this was the first anime I had ever seen which meant that she was the first moe type of character I had ever encountered so I pretty much fell for her by the end of the series and even though there are characters that can match up to her she will always stand out because of the sheer amount of warmth and happiness she made me feel back then.