Is this what you call obsessive personality? I've no idea.. but there are some things that definatly 'preoccupy the mind excessively', for whatever reason. (Note: this isn't my favorites list, that is on the stats page.)
People: John Lennon, Paul McCartney, George Harrison, Ringo Starr, Johnny Depp, Elijah Wood, Orlando Bloom, Daniel Radcliffe, Rupert Grint, Tom Felton, Cate Blanchett, Sandra Bullock, Nicole Kidman, Emma Watson, JK Rowling, 'Sal', 'Andy', Cathrine Zeta-Jones, Christina Ricci, Winona Ryder, Bjork, Enya, Tori Amos, The Three Stooges, Clover (my doggie), Angelina Jolie
Bands: The Beatles, Switchfoot, The Smashing Pumpkins, Aerosmith, Matchbox 20
Movies: The Matrix, Harry Potter, Lord of the Rings, Moulin Rouge, Chicago, Chocolat, Pirates of the Caribbean, The 10th Kingdom
Books: Lost Years of Merlin, Harry Potter, Lord of the Rings, Quest for a Maid
Misc: Guitars, Drums, Violas, Los Angeles, London, NYC, UK, Ireland, Iceland, Japan, Asia, Genealogy, Foriengn Languages, anything Irish, Norwegian, Swedish or English.