Whoa. So glad I got the Han TaunTaun now. Awesome display combo.
I was the same way - I think I only have maybe 6 or 7 figs, all Imperial troopers (plus white Boba,) plus the Taun, speeder bike and Jabba (only because all three were about 50% off.) I've been really good with 6".
And it has been easier to resist this line because many figs (Bossk, IG and Zuckuss, quite a few others) came out weird looking, plus they sometimes have that "undies" look to the crotch area and I don't get why they need those visible pins/holes/joints on the legs when the 3 3/4" versions don't have it and have similar articulation. But... some of these figs are coming out really, really nice now - and they just had to take to Hoth. I assume there'll be a Hoth rebel soldier, then I'm done - multiples time.
And re: other scales, I'm 90% focused on 1/6, and do still have a fair amount of 3 3/4" from years ago, but you can have limited love for other lines - I love my "Unleashed" (2 1/2" tall) Hoth stuff and really enjoy the 6" stuff. You just have to be super disciplined.
The wife will just have to live widdit. Yes that thing is coming in the house.