I happen to have answered to a regexp-related issue on stackoverflow which was also tagged oracle and oracle10g; this led to those two tags being in the "my tags" list and, thus, half of the questions I see in the unanswered mytags page are related to Oracle which I know very little about and which, frankly, don't care much.
I tried using "Ignore Tags + Hide" but that only hides then, i.e. I see less than 10 answers per page, some times as little as 1 or 2 answers per page (the seems to be quite a few questions about Oracle indeed).
Is the a way to intentionally opt-out of unwanted side-effect tags?
EDIT to clarify:
I didn't select any Interesting tag at all so (I guess) it was using all the ones I answered to as a default. I didn't think to try and explicitly define Interesting ones: they actually would be all the 15 of them, except the 2 Oracle ones, so I was mostly happy with the previous list, but OTOH I can't control which side-tags are present on the questions I do answer, so it's probably better to chose Interesting tags explicitly.
Mhh, yes indeed: if I do add some explicit Interesting tags, the "not Interesting, not Ignored" tags are no more selected by default in that page.
OTOH now all the page's tags are yellow-backgrounded (as the Interesting tags are so, I guess) and is a bit of a color-fest, but oh well...