Yeah, I'm bored of the Half-Life episodes. The first one was OK, the second one a bit better, but I don't remember playing either of them and going, "Wooo! Fuck yeah, Half-Life!"
I'd much rather wait a bit longer and get Half-Life 3, as that would mean a new setting, art direction etc.
Also, not a big fan of Portal at all. Dunno about the second one, maybe it has a bit of a story as opposed to just slapping a bunch of challenge 'rooms' together, but the franchise just doesn't do it for me.
I'm bitching though - Valve can still create games that are 'out there' creatively and that's something I should be grateful for in these times of Call of Duty and Oblivion clones...