The breed you have does have an impact on how you view other breeds
How so?
I am open to all breeds.
My last dog was a golden retriever and my DHs a Staffordshire bull terrier.
Our current dog was going to be a husky or GSD so very different to both of those breeds, we ended up with a collie, again, very different to all of those breeds.
We'll be getting a second dog soon and he will be an entirely different breed to the above five.
I start out liking all dog breeds and don't judge unless/until they give me reason to.
To date, all whippets I have met off leash have been rude and boisterous and have frightened my dog with their over the top behaviour.
So naturally I now avoid and if someone was to ask me what I thought of the breed I would obviously say I don't like them very much and find their style of play upsets other dogs.
I don't 'hate' whippets or anything, but I don't particularly like them nor trust their behaviour when it comes to other dogs.
I stand by what I said, in my experience their idea of play is insanely rough and scary.
It is never acceptable to allow another dog to frighten another.
The breeds are absolutely irrelevant.
Whether it is 'play' and friendly intentions, still irrelevant.
It is not okay to allow your dog to frighten other dogs.
And many dogs will find intense, focused chasing, biting, flipping over, holding down on their backs, barking and growling frightening, irrespective of their breed.
But unfortunately whippet owners I meet seem to think it is absolutely is okay because their dog is having a nice time.
In any case, I sincerely hope OP enjoys her whippet and hope she is good to her word re not letting it frighten others.