If you cosplay a character you love your positive energy will show through, and you will be more inspired to put effort into it. I've seen a lot of great cosplays, and many of them were from series I have never read, sometimes never heard of. If anything, it makes me want to read the series that inspired someone that much. Actually, I don't read much manga, so I recognise very few characters. It's ultimately the quality of the cosplay itself that attracts me, both the costume and the cosplayer's portrayal of the character.