I shoot 100% mirrorless, so I am always using an EVF in some form. I tend to use the traditional OVF-styled EVF more often because it's a bit more ergonomic (especially when using bulkier lenses - you're stabilizing the camera against yourself). If using smaller lenses and trying to get photos a bit lower down then I'll switch to the back screen (which is usually flipped out). When shooting video I tend to use the back screen a bit more.
EVF vs OVF... haven't run across this discussion in a long time. I had my reservations at first, but EVFs have come a long, long way. It is useful to see what the camera sees, and EVFs offer a few other benefits. If your camera model supports it, the camera can slow the refresh rate in dark scenes to essentially give you "night vision." Pair it up with magnifying the view and your ability to manually focus far exceeds what you could do with a traditional OVF. Speaking of manually focusing, most cameras also offer focus aids (usually in the form of a "shimmer" effect that comes into play when you're focusing), which is also useful. Maybe I was just never great at manually focusing but my ability to nail focus in scenarios where the autofocus won't work has greatly improved, thanks to EVFs.
The big argument against EVFs and mirrorless is battery life. I've become more aggressively about turning my camera off when not in use, and I am more aware of when my camera is on and the IR sensor indicating if the EVF should be on or off is pointed against my stomach or chest and is triggering the EVF to be active. It sounds like one of those annoyances you never want to deal with, but then becomes second nature and really isn't a big deal.
I wouldn't say that I could never be coaxed back into a mirror-based camera with an OVF, but I don't miss it. That's noteworthy because I initially fought the idea of it and really thought I would.
EVF vs OVF... haven't run across this discussion in a long time. I had my reservations at first, but EVFs have come a long, long way. It is useful to see what the camera sees, and EVFs offer a few other benefits. If your camera model supports it, the camera can slow the refresh rate in dark scenes to essentially give you "night vision." Pair it up with magnifying the view and your ability to manually focus far exceeds what you could do with a traditional OVF. Speaking of manually focusing, most cameras also offer focus aids (usually in the form of a "shimmer" effect that comes into play when you're focusing), which is also useful. Maybe I was just never great at manually focusing but my ability to nail focus in scenarios where the autofocus won't work has greatly improved, thanks to EVFs.
The big argument against EVFs and mirrorless is battery life. I've become more aggressively about turning my camera off when not in use, and I am more aware of when my camera is on and the IR sensor indicating if the EVF should be on or off is pointed against my stomach or chest and is triggering the EVF to be active. It sounds like one of those annoyances you never want to deal with, but then becomes second nature and really isn't a big deal.
I wouldn't say that I could never be coaxed back into a mirror-based camera with an OVF, but I don't miss it. That's noteworthy because I initially fought the idea of it and really thought I would.