Hydro - my favourite only because I'm good at it lol. Plus it's a great map with good areas to switch up tactics
Grind - like it because its new and fresh and generally a great map
Downhill - like it because its good for sniping (although I'm not a sniper) and there's snow! Yay!
Mirage - I'm pretty good on this map (I was terrible when I first played it) although its my least favourite, too much sand