I'm obsessed with Arts & Crafts style and wish I lived in a proper A&C house (mine is Edwardian, and has some A&C-inspired fire surrounds etc, but as they're mass produced they aren't "true" A&C!).
Aesthetically it's all about craftsmanship (obv) and an almost rustic simplicity.
For all the socialist ideals of the Arts & Crafts pioneers, ordinary people could never afford hand-crafted furniture and fabrics, so lots of things were mass-produced in the style and can still be found in antique shops and auctions for affordable prices. Tudric pewter and oak furniture with simple carvings and brass or copper handles are typical.
White walls with heavy, almost tapestry-esque curtains and fabrics (it was supposed to evoke a fantasy of the medieval).
As well as William Morris, Liberty, Heals etc, you can look at some 20th century craftsmen like Robert "Mouseman" Thompson, and I tend to think that anything hand-crafted fits in with the style, even if it's modern. Studio pottery and stained glass, for example, is relatively inexpensive (well, compared with paintings anyway!).
Outside, Gertrude Jekyll-style flower beds and romantic gardens with nooks and corners are classic.