I can't think of anything worse than elephant balls either. If someone wants to come up with weird new balls, make colored clear ones (if it's possible to do such a thing and still make them as hard as regular ones). I imagine it'd be a distraction but at least it'd be pretty, whereas elephant balls look like ... I dunno, half mixed yogurt.
I was surprised to see someone say joint protectors because I thought I was the only one who thought they were kinda useless. I've never seen a cue get its joint somehow ruined. If it does, someone must be treating it rough or it must be poorly manufactured.
I think screw on ferrules that are fatter than the shaft are a huge eyesore too.