I'm the tightwad of the family and everyone knows it. I'm always shopping for a bargain and looking to save money in any way possible. Reducing my cost of living as much as possible is also another crazy masochistic hobby of mine, sometimes at the expense of my quality of life.
These are some examples of when taking your cheapness too far can have a contrary effect on your life based on the law of diminishing returns.
e.g. Eating a poor diet of 2 minute noodles(20c/meal, bargain!) for a year and becoming an anemic and malnourished corpse(they could play you as an extra on the Walking Dead)
e.g. Not having 3rd party insurance("its never going to happen to me") and hitting a $100k Mercedez Benz(nice job buddy!)
e.g. Not paying for the chick on the first date(or even worse, making her pay) and losing the girl of your dreams(she's never gonna call you back)
e.g. Using a frustratingly slow computer still running Windows 95 and a 56k modem because your'e too cheap to upgrade(you're gonna make best friends with the egg timer)
e.g. Being supremely intellectual and studious but not pursuing tertiary education because you are too afraid of amassing a 20k+ HECS debt and the ancillary costs of textbooks, transportation, parking, etc. (you can always become a Garbo)
Gerry Harvey drove through Auburn to get cheap petrol to fill up and was late and missed out on being able to buy a piece of Channel 10 when it was worth much more.