A bit off topic, but I really like how every map (altough they seem quite similar) plays differently:
Mass gold on Zikkurat vs. mass regeneration on Leviathan.
Concentrated action on Crucible vs. open space on Prison.
The strategically important fountains on Exile vs. the weakly defended portals on Cataract.
This was a very nice design choice by the developers. 
Sadly I can't say much for The Brothers or Mandala, because these maps are not played a lot. Whenever I join a Brothers or Mandala game there is someone with a very low simspeed or limited upload which results in everyone leaving due to unplayable lags. If only there was a way to inform players in the lobby if their system can handle these big maps with their many portals.
Actual favourite map statistic (only custom games, to keep out random map choices):
