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Actually I can share mine - it is clear from my nickname.
But it is general. There are couple narrow niche sites
but general is quite good enough too.
On my experience any category could give you decent income from Adsense. But you need to make some research first.
The niche is solid. Lots of advertising.
You're going to laugh, but somebody could be making some extra scratch on a site about "Toilets".
How to repair them, where to rent portable ones, "medical toilets"... you know the spray up your @ss toilet - all well searched, and lacking publishers.
Jump on the gravy train... errr... poop train, and ride it to financial success.
Bonus: Red widgets are going to be hot, hot, hot this Christmas season! While that obviously means that red widget profit margins will be up, up, up, the real secret is this: Red Widget Administrators -- Redwidgmins -- will be able to write their own ticket!