Dreamwave was pretty nasty, and the art in these scans is just incomprehensible. I think Yomtov grates more with me because even as a kid, collecting the UK Transformers run, the change from the US penned stories and their shonky artwork, to the far superior UK based stuff was jarring.
But Senior's art shone so much more when Steve White was doing the colouring, on stories like Fire on High and Galvatron: Wanted Dead or Alive. Any of the Marvel UK colourers (if that's the right plural) really.
It always just baffled me how there could be such a massive, obvious difference in the quality of the work, and the care taken by those involved.