Re: What DIDN'T you like about Iron Man 3? *SPOILER ALERT*
I had an epiphany. Although I don't think it was well executed at all, I get why they blew up his home, suits, and had him toss the arc reactor.
The end credit montage spells out without saying it that this film could have been the last movie with RDJ as Iron Man. I think the destruction of all of the RDJ-as-Stark's iconic possessions was intentionally a screw you to any future attempts to "James Bond the character".
RDJ, "You might recast, but you won't do it with this house, these suits, or this arc reactor. They belong to me."
A sentiment I agree with, however badly done.