If they make R3 old school again - which is what I liked about R1 - and also get some consistency into the plot (do the Chimera need cold or not? One minute they want to turn the world into an ice world the next they're running around sunny America apparently having decided, to quote the Madagascar penguins, that freezing cold "sucks") then R3 for me.
I enjoyed Killzone 2, and I did like the MP, feel of the game, etc. but they need a much stronger narrative and flow and more variety to the gameplay. I did like the end of KZ2 quite a bit, even if the game hadn't worked up to it very well, so maybe KZ3 will pick up from there and keep it consistent, too.
But for me Resistance has my favourite setting and backstory of the console based FPS, but I felt Insomniac squandered their good work somewhat in R2 with some seemingly major changes in what's going on plus a blatant switch from the old school carry millions of weapons that everyone liked in R1 to a CoD4/Halo clone approach, which I'm sure lost them sales as that got pretty consistent bad word of mouth.
I'll probably end up buying both anyway so I guess it's a moot point.
Try to be reasonable... its easier than you think...
