I'm not a fan of the integrated tail light/indicators, I'm pretty sure they're illegal too. Of course if you bike has a huge lump of plastic as a numberplate hanger then get a small tail tidy, but not something that (probably) will end up getting you pulled over.
Same with tiny numberplates, I see these on used bikes and I think they just look ridiculous - I'm talking the tiny plates with tiny letters all on one line (motorbike plates s have to be on 2 lines). Slightly smaller than normal is fine (7x5), just not ridiculous.
I just don't see the point. I mean even the most sexy sportsbike has several bits of plastic/carbon/metal sticking out of it, does one more really make that much of a difference?