What is your opinion of each Halo title and the series as a whole?

[Reasonable]

Halo CE: 4 stars on Xbox and 4.5 on PC with Level editor - great SP campaign, deep world and loved the vehicles

Halo 2 : 3 stars SP 4 stars MP - SP started to lose the plot and MP was clearly becoming the focus and reason for the franchise

Halo 3 : 3 stars SP 5 stars MP - SP remained weak I thought, if a bit better than 2, while MP was great but it was clear MP was what the franchise was now about, to the apparent detriment of the SP


Overall - pretty damn good series, even if I remain disappointed the SP campaign fell apart after CE and the focus clearly shifted to MP.