Lately it's been collecting Indie Perfumes. They are much more adventurous and complex than most mainstream scents. It's really fun to pair scents with experiences or moods. I've roped my husband into it and it's like a puzzle game to find scents for him as well.
Not the op, but I really like Imaginary Authors scent lines. Specifically A City On Fire which smells like you were sitting next to a campfire for hours on end before you arrived wherever you are. Cape Heartache is also a really unique scent with strawberry and fir, so like a masculine sweet scent. And for something a lot less challenging, Fox in the Flower Field is also amazing. It leans more like a Chanel N°5 but cuts it with an ozone note that takes away the aldehydic note and replaced it with a darker undertone. I'd love to hear some other good scent houses people have used though too as I'm always looking for something new/exciting/different.
My favorites right now are Black Phoenix Alchemy Lab (fair warning their website is a bit daunting, but they have tons of great stuff), and Solstice Scents (they do complex atmospheric scents very well).