Well, our look has evolved over time (despite having some supposedly on trend or even out of date!) colours. For example, we have a collection of vintage taxidermy butterflies (used to have 200+ cases, but sold many with a previous house) that we began putting together when we bought our first home in the '90s. Gradually we've added more items in a similar style (lots of vintage bird prints, the odd stuffed bird, jardinieres with plants/bulbs, books) as well as just anything we love, regardless of its current status fashion-wise.
We also started collecting brown furniture ages ago (I fondly recall getting stranded on a carboot field in about 2000 with a huge chest of drawers that wouldn't fit in anyone's car, lol!), which progressed through Art Deco to Art Nouveau and Arts and Crafts. These days we still have a few bits of everything, but have also mixed in some Aesthetic and MCM.
However, we also have a couple of Rockett St George things (eg, a gold monkey planter 😉) that fit with our style.
As someone who studied fashion design, I've always liked my textiles, so these feature heavily in our room schemes, with a mix of old and new. Imho, it all looks good together, but nothing really matches per se.
We also early on adopted the idea of painting everything the same colour in a room (including the ceiling in our current hall and family bathroom), from skirting to architrave to walls....but I got this idea from an old book on interiors in much grander old houses than ours. I only realised it was a thing after I spotted similar cropping up regularly on Instagram etc 😂 It's a look I love and will continue to do in any future houses.