I am half way between these two opinions really. I definitely preferred this years BB to last years, which I hated with a vengence, but it was certainly very dull at times.
This is the first year when I just haven't bothered to switch it on in the background when I have been in most days, and even though I did prefer this years housemates, and I do agree that there has been some interesting things (such as Cameron's trip to Africa which was wonderful) it has been generally uninspiring.
I'm still looking forward to BB5 though