I've never been a fan of chevrons, but I'm not a fan of ANYTHING that has really angular lines, it seems... I like curves much mo' bettah! Even so - I've seen them done really well and can't think that it matters much if they're "in" or "out", like others have said - if you love 'em, use 'em!
I don't know if things are trendy or not - I'm SO not in the loop! I do think that there's been overkill on several fronts (owls and cupcakes come to mind), but I'm as guilty as the next person of "collecting" every stamp set, die, or punch that has motifs I love (hearts, anyone?), so I get it if you fret when something you love is considered "over"...
Happy for no reason...