After a while they all start to look the same

I think that's mainly because I've spent so much time faffing with lights that the differences between the renders are often hardly noticable. I have forced some self discipline upon myself now. I've left the lights alone and finished setting some bits and pieces up. So, currently, these are my most finished renders of 4 different scenes









I'm thinking the eye-light the botton pic is far too bright... which is odd, because it wasn't and I don't recall adding any extra lights in that would have affected it's brightness....??