Well,....I personally love the Black Watch tartan, as i have a love for all things military, and most of the military tartans are based around the Black Watch tartan, (or Government tartan).
The Gordon is Black watch with a yellow stripe,
The McKenzie is BW with a red a white stripe,
The Leslie is the same (different pattern)
The Sutherland tartan is a lighter shade of BW,
and so on........
I can however understand why some Scottish folk wouldn't like it, but that is a matter i would prefer avoid.
I think that to see a Black Watch drummer in scarlet doublet and BW tartan kilt, is a great contrasting and beautiful uniform.

Just my humble opinion.
Neil.