What is a positive connotation of obsessive?

How can you tell the difference between a replica and an authintic mint condition 1883 gold kalakaua 1 dollar coin? How much is a 20 cent Martin Luther stamp? What is the value of 1921 rand mcnally handy atlas of the world? What is the value of a 1980 Topps Charlie Hough card number 644? What is sally Pearsons favorite hobbies? Where is the Royal Mint located? Are Canadian 5 and 10 dollar olympic commemorative coins silver? What is the color of the Willis Tower? How much is the 1645 Florin worth? What is the value of Enfield rifle No5-MK1? What creatures are fairies afraid of? Are the 1974 no mint Lincoln penny's on eBay real? How much is a 50 cent Chester W Nimitz stamp worth to a stamp collector? What is the value of a Franklin D Roosevelt 1933 Inauguration coin minted by Meyer and Wenthe Chicago featuring the capital building on the reverse side? What book comes after Amelie the seal fairy? What is the value of a 1960 Canadian cent? What are antique toy cars filled with liquor worth? What is the value of a Japanese tien Gulden bill? How far is it to walk around the world? What is the value of a baseball card of Bobby Abreu?