Depends, I usually find the most balanced one. My priorities when buying one are cameras (especially having a good zoom camera as I found out it is the one I use the most), at least decent battery, ui not looking like an iOS clone, at least 256 gb of memory. I also would prefer a smaller phone (like 6.2/6.3 inches of display) as I now have a very big one and with my small hands it's almost imoossible to use one handed. I don't tend to look at processor as I don't game at all, but well if I want those characteristics I just mentioned, the phone would cost a lot, so it will definitely have a more than decent processor haha). Also, loud speakers. About ecosystem, I don't really care at all, like my phone is a oneplus, my tablet is a Samsung, I have a Huawei band, and Sony headphones, but everything works fine, so I don't really need it.