Passing video game thoughts...

So I've played through my Call of Duty game. Beat the GAME game, like offline play. Actually that's been beat for bit, to be completely honest. I've been playing through online levels. Got to level 70, a while ago. In Laymen's terms that means "reached the end." Now comes the great debate...

Do I prestige, or just play there for a while, and hope for a new game soon? (Laymen's terms for "prestige"; reset back to level one, but keep all titles and stuff. This pushes a player to get to the end again, and again, and again.) Apparently I can't even have the OPTION of prestiging (what an awkward word) until I "level up" again, which I have been playing. But the questions still remains; should I continue with the same, with the lacking number of people because Black Ops came out, or should I think of checking out new games.

I wasn't really interested, but I heard some good things about Assassin's Creed. The series caught my attention. I heard a radio show talking about it, and they had good things to say.

Of course I'd start with the first one, but I'm just sort of running on two people's (who I don't know) opinion on it. Has anyone out there played it? What do you suggest? Is it close to Call of Duty? I assume it's medievally, which is cool, if it works.

So words of advice would be cool. Also, should I rent it to test it, or just go balls out and buy it? Do they tie into each other, or can I hop down the list to the last one without missing anything?

Let me know if you have any words of advice, and/or input.

:)