These are all good things too know in life as most People that are members here that are of a young age might not know about this yet so it's a good way to help them learn with anothers personal experience in life. Now as for the part where instinct vs. tell them how you feel....yes instinct is usually best cuz ya got a 60-40 chance of it working in your favor. But remember, some people, guys and girls, like being told how you feel about them.
Now what about those picly people. ya know, the ones who decide if they like ya based on your looks, inteligence, maturity level, personality, etc...I can't really stand thjose kinda people. Sure everyone is like that in a certain way but I'm referring to the ones that take it too far.