What makes a series get lots of fanart

[Claraviolet]

So what do you all think?
Is it based on the popularity alone? Or the anime moments?

 

[Blackangel]

may be when they are actually have coolest story and plot.
and you need to understand that not all the anime plots can be very popular.

 

[Sincerem]

Some plots are popular while some interesting animé series aren't popular. That's just it, everyone has preference. What suit Mr A might not suit Mr B.