I'm guilty of most of these :#.
I think using columns as trim on houses is builders' way of adding interest to the siding, to kind of give it a less flat look. I do it because the siding with the trim rarely looks right. A lot of the time, some corners on the exterior don't have the trim. It's really frustrating.
For me, I would say probably the chunky roof trim. Also, I'm not a fan of tiny houses. I've built a couple but I don't care for them. I understand the challenge but it's just not for me.