What would you score each Halo game in the 1 to 5 scale?

[Theo]

I don't love or hate Halo, but I do hate marmite. bleugh!

Halo 1 was sexcellent, 8 player LAN party matches were the shit.
Halo 2 was fun online for a bit, Halo 3 was too similar. Good, but I was bored of it by then. Like I'm bored of COD now (or should I say MW)