When I used straights, I would also prop up one of the needles. Forget which one, prolly the left needle.
However, I will say this: since you've only been knitting since 2008....IF you really want to make the change to the 'correct' positioning...the sooner you do it, the better.
Also, if you ever get to knitting for hours on end...using circs is easier on your wrists because the weight of the knitting as it gets longer and longer rests in the middle of your lap, instead of hanging from your hands and wrists. The weight of the knitting (with circs) is also even distributed.
But, other than that...knit on, good sister! Whatever works!