To each his own I guess. I hate NMM, the way the columns resize and just plain weird UI stuff pisses me off. The upgrade functionality can also break mods as often as not due to differences in packing and things like texture mods. The Nexus network sucks too, their DL servers are down as often as not and the moderators on there are just plain nuts. I usually stick to Mod Organizer but it's a bit more complex than most people would prefer.
Playing: Dark Souls 2: Scholars of the First Sin Watching: Mr. Robot