I tend to purchase faster than I open, for various reasons.
I was never going to get much of animated, but then I was talked in to going to Botcon 2011 by a mate. of course knowing that most of the set was decepticons I started getting a few toys at retail here, to even out the ranks, then I kept seeing them pop up here and there on clearance, or discount and before you know it by the time I got back from the convention I had most of them. so I bought pretty much the whole line with the exception of some of the odd late series sets that didn't turn up on screen. I still haven't opened most of them.

I have about 45 in the study that I haven't opened.
I haven't yet opened any of the beast wars MP's (this is partially through lack of interest)
I haven't yet opened any of the movie MPM's (mostly because I was waiting for a place to display them)
I prbably have another 50 odd spread out in boxes in the garage that I'm yet to open.