Yeah, I am also a history person and cannot watch this show because of the "no relation to reality" problem, but...
I did watch the very first episode and I didn't mind that they cast Rhys-Davies as Henry since he was a young, VERY fit, athletic guy. Finally, someone was acknowledging that he was considered the most attractive monarch in Europe until his leg ulcerated and he got depressed and could no longer exercise (started getting bad around Jane Seymour, went to hell by the end of Katherine Howard). But then the fellow who played the Duke of Buckingham strolled in -- tall, broad shoulders, red haired, and I was immediately irritated -- he should have been Henry!!!
BTW, one day, someone will shoot a mini series about Henry where they actually look at a picture of Katherine of Aragon (the only wife I saw -- and there are at least 3 extant portraits of her) and note that she was fair skinned and red haired -- not dark skinned and black haired. Just because she was Spanish royalty does not mean she was typically Spanish in appearance -- she was, in fact, closely related to Henry and had many northern European ancestors.
End of Rant,
Tobermory