Is himechan a reference to in FFXIV?

[Kanti]

So is it a negative reference then?

That's correct. Whenever you see someone use it, it's likely them complaining about a certain player. I can't really think of anything we use in English for those kinds of players. The only thing that comes to mind is "attention whore."

edit: If you want to delve even deeper into the net culture behind the term, I did a quick check on google about it and I guess there's a list of general stereotypes for hime-chan players.

1. Female character
2. Typically Lalafell
3. Almost always main a healer (typically WHM)
4. Excessive use of emoticons ( 　　(((o(*ﾟ▽ﾟ*)o)))　　(ﾉ´∀｀*)　　　(´・ω・｀) etc )
5. "btw I'm a girl lol" type behavior.