I'm interested in spiritual lineages, particularly Thelemite (e.g. A.'.A.'., EGC episcopal), western Shaivite (e.g. AMOOKOS, various Nath groups), and various other yogic groups that have become popular in the west (e.g. Self Realization Fellowship, Ramakrishna Order). But most lineages are interesting in their own right. The Deseret News has a nice short article on the lineage of the various current polygamist LDS groups.