changing frequently, esp. as regards one's loyalties, interests, or affection : Web patrons are a notoriously fickle lot, bouncing from one site to another on a whim | the weather is forever fickle.
fickly |ˈfik(ə)lē| adverb
ORIGIN Old English ficol [deceitful] .
I’ve always known I’m fickle.
placing too much emphasis on trivial or minor details; fussy : persnickety gardeners | she's very persnickety about her food.
• requiring a particularly precise or careful approach : it's hard to find a film more persnickety and difficult to use than black-and-white infrared.
ORIGIN early 19th cent. (originally Scots): of unknown origin.
I’m also aware that I can be tremendously persnickety.