Normally I wear business suits for work and jeans or shorts at home.
The only time I don't wear one extreme or the other is when I go to church or to something at the kids' schools. I want to look presentable but I don't want to put on a suit if it's not required.
For those occasions I wear dockers and a button-up casual shirt with oxford shoes.
That's also my choice when I travel for the same reason, I want to look presentable but I don't want to really dress up.
Many people here and in Europe are wearing nice jeans and look great. IMO jeans don't travel well because they're heavier/bulkier than other pants and they aren't easily laundered. Because they're cotton they also tend to stretch in the waist, butt and knees when they aren't machine washed and dried regularly.
As long as they're dry. Jeans are a good cold weather choice. If they get wet from rain, snow or accidentally stepping in water, jeans will give you almost no insulation and won't dry. Most backcountry guides highly discourage cotton for hiking/backpacking.