i had a look at roulette ages ago, but the truth is on a computer, it is PURE chance, due to the way the computer generates things...
in real life, sure ppl can make big dollar from roulette and blackjack, but on computers it can be very difficult.. you will see lots of systems that say u can get rich off roulette, but I for one think it is very difficult. in the past i have profited from poker, and sports betting - as they both require a bit of nouse - i.e. you need to know a little about the game, and the odds are not calculated - with poker, if you have a table of 6 idiots, you will surely skank em. the same with sports betting, you develop a system, and because the odds are 'natural' if you bet long enough you're guaranteed to win - eventually.
if anyone has some reliable sports betting systems, i'd be interested to get a ref.link and try em out, but sadly im a bit low on cash at the minute.. oops.