Fetching details from the dictionary...

to be obsessive (about); to be overly concerned (with); to fuss (over); to worry too much (about); to be picky (about); to be hung up (on); to stick to
to be particular (about); to pay special attention (to); to be fastidious (about); to insist (on); to be uncompromising
細かいことにこだわりすぎると進まない。
If you're too particular about details, you won't make progress.
彼は食材の品質にとてもこだわっている。
He is very particular about the quality of ingredients.
味にこだわっている。
I am particular about flavor.