Mostly because I'm curious what you folks like to work with. For myself, I like using Olympus cameras partly because of the size (it's so cute guys, and the lenses are tiny), partly the aspect ratio because I've never liked 3:2, and partly because of Live Composite (explanation here: https://www.duford.com/2016/08/explaining-olympus-live-composite-mode/ ) which is great for light trails/fireworks/actual fire. I've got too many lenses because self control is hard, but the main two that I actually use are the Olympus 45 f/1.8 (majority of the portraits/live music are with this) and the Olympus 75-300II (wildlife, some landscapes, daytime portraits). For bodies I use the E-m10mkI (hiking/travel) & E-m5mkII (everything else).