Ok so I finally got round to watching Fringe S03 - being laid up for over a month during the summer meant I didn't get as much done as I wanted but c'est la vie.
I was sooooo disappointed by it when I watched the whole thing, the love triangle was just kinda dumb and the ending where they just wrote a long term character out of existence left me sitting staring at the screen going "WTF people!".
The first 2 seasons had so much promise, the underlying story ark was ok and but they were basically the mad science police which made them awesome. Walter is by far my favourite character with all his mad science going on in the background and self medication, but with Peter written out of existence how can there be a rift between universes? He would have had no reason to go to the other side. Also without all the Peter business he would be a different Walter(s) because he would not have had the experiences which helped shape his personality, same goes for the Olivias. I think a lot of shows try too much to give characters depth or have a huge reveal when people like me would be happy with just monster or mad scientist of the week/month. Instead the people in TV land try to make Sci Fi shows more soap operaish by adding all this lovey dovey crap, having mad twists and mysterious creepy bald guys who dress like it's still the 1950's.
So my advice would be not to waste your time on Fringe and watch the new Conan movie a few times instead :)