Believe me, I know exactly what you mean - tanks everywhere!
Thank goodness I live alone because I'd hate to have to explain my craziness these last few months. :)
I have a 20 g long - sorority - in my library (once was a living room but I don't need two of those) ... a 20 g High in my library too... and let's not forget my 2.5 gallon planted 'photo' tank (that's now housing my newest delta boy, galahad).
and in the living room (what was once a dining room) I have another 20 g High and a 30 G ... In my bedroom there's a 12 gallon eclipse, and I bought a 5 gallon hex to set up sooner or later ...
and in my bathroom theres a 5 gallon corner eclipse ... and in the back hall way (tiny space that has doors to the bedroom, bathroom, living room, kitchen, and to the downstairs hall (outside apartment) ... there's the still empty 15 gallon High.
We're all a bunch of nuts, eh? :)