I just love the low rolled chords on a harp. I know that a lot of people like the fiddly, noodly bits at the high end, but the low chords like the ones that pop up partway through the Fauré Impromptu are just so wonderful to me. It makes the harp sound like a purring, contented tiger or a purring dragon. It’s a large, warm, contented sighing animal.
Anyhow, you can tell I’m having a good time right now rolling low chords. I like them in the piano as well, but the piano is so insistent sounding that the tempering in the low end can sound more jarring than on the harp. Low thirds can sound more clattery on the piano.