Oh gosh like...everything. Things that aren't apart of sets, ranch and cabin with some rococococococococo influence, special items, clothing items, alpine and antiques, classic and trendy pieces, yaddayadda.
I like small, cozy homes that feel lived-in. My rule for when I go to Nook's is that if I pause for even just a moment to consider if it could work: buy it. Much like real life, a home can change its personality every season with little additions or swaps in fabrics, pillows, and other accessories. With that in mind I know I'll find another piece that'll complement and it eventually becomes a fantastic space!~
Customized Rococo with different instruments and using the sleek floor or even the harvest wall with the Gothic black. A lot of sets don't seem to mix well.