Do great spot like features favour appear in south hemisphere?
Given that we have very few examples, we could not, statistically, draw any significance from any apparent bias.  It's also hard to see any theoretical basis for expecting a bias, so my gut feeling would be there probably is no bias.

It's also worth remembering that human observations of these things are essentially a very brief snapshot in a huge period during which we have no idea about what may have been happening.  So again the statistical significance of what happens at the moment needs to be carefully considered.