I do almost all of my sketching on location so I’m very comfortable doing so. There is one circumstance, however, that I find challenging. Looking up at the subject to be sketched always seems harder than it should be. I don’t know if there’s something about the upward-looking angle or the fact that I have to bob my head through a much larger angle between subject and paper. In any case, getting the proportions and perspective correct is always harder.
We were sketching at the train station, though, and I drew this portion of one of the buildings. Quebec is blessed with these sorts of rooftops and so looking up is is worth the effort.