WHEN YOU LOOK IN YOUR JUICE DRAWER... and find loads of crappy mtl eliquid that are harsh as fuck
If they are harsh on the throat it probably a case of you having problems with either Freebase or Nic Salt type nicotine. If the ones you have problems with are 10 and 20mg strength then avoid Nic Salts, if they are 6, 9, 12, 18 (or any other number that isn't 10 or 20) then you have a problem with Freebase.
I can't vape any Freebase above 3mg without acute throat problems. Others can have similar issues with Nic Salts.