I think being "Eco Friendly" as a host can be pretty difficult.
I have solar panels for hot water. One thing I've never had a guest complain about is enough hot water!!
I have a garden planted with native perennials and fruit trees, to encourage pollinators, and have a thriving vegetable garden in summer. Many native perennials can seem weedy, unless one knows one's garden plants, with the result being that the garden can look "overgrown". Not everyone likes that look.
I do not use any chemical sprays or fertilizers in the garden, and never use chemical sprays inside the house. That, of course, can mean there may be bugs. People get really upset when there are bugs. Spiders around a house are, actually, a very good thing because they trap flies. Try and convince a guest that spiders are a good thing, especially when they have the temerity to crawl inside !
The most recent thing someone got upset with me for was lack of a coffee maker. Since the majority of them, now, are the kind that use pods, I will never buy one. Tens of billions of single-use plastic pods go to landfills each and every day !
Occasionally, I do have guests who will ask where to put recyclables - it's always encouraging to hear that.
I try and keep the heat and air turned to a reasonable level, and provide space heaters and electric fans, but folks want things cooking hot in winter, or blasting cold in summer.
A fresh fragrance on laundry is "clean" to some, and "chemical" to others. I try and keep fragrance use to a minimum, but even non-perfumed cleaners have some scent, and folks don't always like that smell.