At the moment the most played beatmaps section of a players profile only shows the amount of times the beatmap has been played and orders them this way. This is inaccurate because firstly some beatmaps are significantly longer than others and secondly plays that only last for part of a map are counted as a full play. I think that the amount of time spent playing each beatmap should be shown next to the amount played and the most played beatmaps should be ordered this way. This could additionally be implemented for a players overall playcount showing how many hours in total they have played osu! for.
There is a major problem in the fact that osu! has probably not been recording the time spent on each play, so it would be difficult to estimate the amount of time everyone has played on each beatmap (to date).
There is a major problem in the fact that osu! has probably not been recording the time spent on each play, so it would be difficult to estimate the amount of time everyone has played on each beatmap (to date).