persnickety

a. 1. Finicky or fussy; demanding excessive attention to petty details or niceties; unduly particular; fastidious; -- of people. [ Colloq. ]
Syn. -- finical, finicky, fussy, meticulous, painstaking, pernickety, pernicketty, punctilious. [ Webster 1913 Suppl. +PJC ]

2. Snobbish; behaving aloofly. [ Colloq. ]
Syn. -- pernickety, pernicketty. [ PJC ]