Looking for "the mobile phone"

Hi everyone! This is my first post here (I'm noob, yes!) but I'm sure all of you are really nice people, aren't you? Well the main point here is that it's been a long time since I've been looking for the "right" mobile phone. My phone right now is the Sony Xperia M2 (it's not fantastic but... it's something) and I think that it's time for a change. So, if you don't have any interesting thing to do, would you like to help me? Comment below which are, in your opinion, your best mobile phones :) Thank you!! ♥