yeah I like halo 2 don't get me wrong, i didn't get what bungie said we were going to get and that is the only disapointment. but the first person game still has much to offer. online only games are judged by online play. non online games are judged by there quality, and games with both are judge by what they bring to all with compatible consoles/pc's first and then if that scores bad they say "but ATLEAST the online game brings something new to online gaming" which means game falls short by a margine but the online features help from flopping. this is not nescessarilly about halo 2 but all games.
Also, not to be a D1CK, but from your comment you bought halo: ce. i wasn't online compatible, unless you have a modded box. was it worth buying? maybe you maight consider games that aren't online compatible. some are better than you think. online gets repeatative and old to me. its the same characters killing eachother over, and over, and over, and over, and over, and over, and over.