Before you go overboard and fill up a space with knick-knacks, consider what is already in the room and whether or not it ticks all the boxes: colour - pattern - texture. If you have covered all three it's time to be restrained and hold yourself back.
This is my Favorite Fern! • Maidenhair Ferns are a great option because they have frilly fun leaves that vary from the usual thick leaves of indoor plants. Most Ferns do well inside with low light (and ferns look great in terrariums) so check out others like Silver Lace Fern with variegated leaves.