Thomas Hardy's novels are characterized by 3 key elements:
1) Naturalistic and realistic depictions of rural English life through the use of everyday language and descriptions of the landscape.
2) Complex and morally ambiguous characters who often struggle against their passions and circumstances. Their dialogues reflect their social positions and personalities.
3) Dramatic plotlines with suspenseful mini-climaxes between quick scene breaks, told through a theatrical style with monologues and soliloquies in each chapter.