I usually rip off the highest quality that I can find but my internet speed sucks, so there were definitely a few instances back in the golden halcyon times of last year before the anime apocalypse that I would choose 720 p because downloading a single 24 minute 1080p episode with a 700 mb file size seemed ridiculous. I may just be a philistine, but honestly I think the difference between the 2 when it comes to animated content are completely negligible.
I'm all about ripping dubbed anime and saving it and am really glad that I've been doing that off and on for the last year and a half or so seeing how all the streaming options are dying off.