I've been through several different phases - at first I thought Watershed was the best one, then Ghost Reveries and for the last months it's been Blackwater Park. I don't really see that changing since I love every single song in BWP while I think the other albums have a couple weaker moments. For me, BWP > Watershed > GR.
I'm still trying to get Still Life to click, I enjoy some songs but the album as a whole sounds somewhat "samey" to me, as soon as I finish listening to it I can't differentiate riffs or songs by memory.