Man, I've done some pretty dumb things in a car. I wouldn't even go so far as to say you deserved the ticket, that's another story. But generally speaking, going ~20mph will very often get you a ticket. On some highways I take, you can be ticketed for going 10 over. I was once given a warning for 13 over on 287, everyone I know who has been pulled over for 15+ has been ticketed.
Really, you shouldn't ever go more than 10mph over if you don't want to risk getting a ticket. Anything above 15mph over puts you in 'very very likely to get a ticket' territory, and when you're regularly doing 20+mph over, you're almost in 'reckless driving' territory (25+). Seeing as not all radars/speedometers are 100% accurate, you don't want to chance it. Better that you get a relatively minor ticket now rather than reckless down the road.
Really, you shouldn't ever go more than 10mph over if you don't want to risk getting a ticket. Anything above 15mph over puts you in 'very very likely to get a ticket' territory, and when you're regularly doing 20+mph over, you're almost in 'reckless driving' territory (25+). Seeing as not all radars/speedometers are 100% accurate, you don't want to chance it. Better that you get a relatively minor ticket now rather than reckless down the road.

