Man, I am in the same boat!! So far I have all mine displayed MOC other than about 8 or so that I've bought doubles of to open. I thought this is what I would continue to do, but the line just keeps going and they're becoming just way too expensive to even buy loose doubles from a 3rd party. I want to open them, but then I see Scareglow going for $80+ MOC on eBay, and I feel like I'm destroying the value. However I don't collect for value and will never sell them, so I don't know what I'm clinging to?? Up until MOTUC I was mainly an "opener" but often times I found I didn't like the fig as much loose as I did MOC, or I moved on to collecting a differnt line and put them away and wished I'd of left them MOC. So it's a bit of a catch 22.
Although, I did tell myself that if I got a Castle Grayskull I would not be able to resist opening everything and posing them in the castle!!! I MUST open Castle Grayskull! I can't leave it consealed inside a box never seeing it, forever!
I have a 6 month old son (who already likes chewing on a vintage Beastman. haha) and I think I may just keep everything MOC until he's ready to play with them responsibly (not just destroy them) and we'll open them all together and have a grand ole time playing with them. Until then he can play with my near complete loose 200X collection.
I really do love looking at them all displayed MOC, there's just something about the freshness or perfectness of MOC, because I know once I open them I'll find loose joints, paint issues, ect and will wish I left them MOC where I already enjoyed them.
So yes, I totally share in your torment of loose vs MOC! haha It is a nice problem to have tho! For as much grief as Matty gives us with this line, it's still an amazing line that I for one never imagined!