Really, it all depends on your personal taste. For me any mmorpg with a good open world and character customization with good graphics is a win.
I think ELCHRONICLE seems to be a good RPG this year on android. The graphics and the game performance is top notch if you ask me.
I really wanted a new Lineage II game with action base battle. As the art of the game is perfect, but the leveling was terrible.
If you like games that are innovative check out ashes of creation, it's not out yet but it's in pre-alpha and has tons of viewing content to help you decide if the game will be right for you
I'd say it's all personal taste too yea, I have friends who love Guild Wars 2 but it's not my thing at all. Don't be afraid to try stuff out until you find something you like! I'm keeping Ashes in the back of my mind as well, but it's been years since I first heard of it so I kinda lost the hype feeling :/
For me, it depends with how I play it with ease on my choosen device. If it's not supported on my current device no matter how cool the game is, then it won't be my best game.