When you throw a boomerang you need to press the "action key" (default is "Spacebar") in order to catch it as it returns; which normally isn't an issue, but oftentimes I will find myself trying to pick flowers, dropped items, saplings, rocks, and to perform all sorts of other actions which results in getting hit unless you are in a completely barren area.
My suggestion is that the button held to grab the boomerang as it returns be changed to the "combat key" instead (default is "F"). This would make throwing the boomerang much less of a hassle to grab on its return, and uses the very same button that many use to throw it. Thank you for your time.