Bohemianism is an unconventional way of life that people choose to partake in. It is seen as a 'free' type of lifestyle.
Bohemians are often perceived as adventurers, gypsies, wanderers or vagabonds. They can almost be referred to as outsiders, not trying to fit in to norms of society around them.
They are very involved in art, music and literature - they pursue this very freely and often more often than not with people of similar orientation and lifestyle.