I like the first the best (imagining the centre of the circle on top of the shoulder joint). Though yellow doesn't always read well, without a black outline around it. I really like the third one in principle, but I think it needs some smoothing out - and if it were my design, I'd have the 'inner circle' tails so that each one has one under, one over the next, so they're more equal - the venus symbol is a bit sidelined.