I would fit in the same category of users like you. I've been using micro for a few months and I find it a very pleasant experience. My downsides so far are: haven't found a way to disable the somewhat aggressive mouse control, haven't found a way to disable coloring background (slow rendering on remote ssh) and paste buffers being messed up in recent releases. I just opened a 500mb csv which arguably was slower than using vi/vim but still fast enough and snappy after the initial load.