no s6 for me
While i appreciate I'm in a minority, the reason i bought a s4 was the sd card slot and removable battery. As a work phone, it's so much easier to swap the battery when it is running low than plug in and carry around one of those external packs while I'm trying to speak on the phone and there isn't a handy socket nearby. Similarly, work will only buy me the base storage version as any additional storage costs more and isn't really for work purposes (i have a 64 gb card with music, podcasts, games etc on it).
Quite sad as i don't think there is a flagship Android with a removable battery now.