If you take upon yourself minhagim that isn’t a contradiction to your other minhagim, what’s wrong with that? I saw other people bentching their kids every Fri. night and thought it was a nice minhag. I took that upon myself when I had kids. My father didn’t do that nor does he have a problem with it.
However it’s a shame when one drops minhagim that he grew up with. (ie. the yeshivishe guys that came from a chassidishesh background and now scoff at their fathers minhagim)