Many people who lose money in options...or trading for that matter...is that their ego doesn't allow them to admit they are wrong and move on to the next day.
I use my instincts too...along with a few indicators...and pull the trigger once...if it hits I'm out quick and with a sizable profit...if not, I get out and look for the next day's sun to rise.
It's all about managing your money and preserving as much as possible when you are wrong. So, manage your "large amount" accordingly.