I'm in the same boat where somethign comes along and I like it better... For instance the highly unlikely, but possible, Imperial AT-TE... If Hasbro put the AT-TE out with a pretty simple "grey" deco, no Republic red, and only a couple Imp logos and some actual weathering because it's an older piece of armor... Well, I'd be compelled to buy it.
EU perhaps, but it's a deco I'd prefer ont he vehicle, ironically. I have 3 AT-TE's, and I'd still be driven to buy a 4th I think.
At the same time... Jedi Fighters. They're everywhere. They're like fly crap.
I'm all for them being made to get the obscurity of a Cloud Car, but I'm to the point I just don't buy JSF's.

I even like them a lot... But how many can one person own? Where would I even ponder hanging them all? I'm sure all together they must look awesome, but there are just so many.
The more "important" teh vehicle is to me, I think the more likely I am to get a repaint too... Snowspeeders, I'll probably buy whatever they throw at me. Prequal stuff I'm less likely to care.
I have that issue though, where something comes along I like better, and then I'm hanging onto the one I have now that I want less. Kind of sucks.
Interesting "3 ship limit" you set too Anton... That's a different way of looking at it too.
Looking at my vehicle stash, and again since I don't generally buy it unless it's to-scale, I should be limited, but I see that I have LOTS of certain ships. Some bought with the idea of customizing. The way the line has gone on and on though, I really probably have way too many ships.