I am kind of in awe of people who can just decide how they are going to wear them and then leave it like that for the day. I am always fiddling with my buttons and have a strong tendency towards doing them up
While leaving buttons undone is supposed to create a LLL (long lean line) I fear that it reveals my midsection when I would rather it were covered.
I have done some belting of cardis, but still mostly wear them unbuttoned.
In terms of long vs cropped my preference is for cropped too (Hi Fi)!. For someone of my proportions (ie long torso/short legs) they create a better line.
However I have bought 2 long cardis this (Australian) winter. One is still to arrive and I confess to not having really worked out how to wear the other - have tried pinning it together, belting it (not good) and wearing it open over a belt (liked this better)