First game of this series I fell in love with was COD: WaW with the original zombies. I had it on the PS3, and me and my son, who was 8 at the time, would go on there and destroy people. We'd rag on people for using the Juggernaut perk (pussies can't die like normal pussies, lol). That would have to be my favorite of the series. Because it was the first one me and my son played, and we spent a lot of time on that thing. I remember giving him the headset one day, he owned everyone, and then afterwards was like, "y'all got beat by an 8 year old, whatcha think about that?" Lol.
Not a camper. Am a nasty quick sniper though (from my days playing the SOCOM series). The highest level I got on Zombies, solo, was 41 on Zombie Verruckt. Next best is 39 on Nacht der Untoten. No glitches. Just pure addiction. Lmao. And many hours of practice.
As far as tips or hints, for multi-player: Get a nice headset (you can hear people walking and popping pins on their 'nades), set your controllers sensitivity to medium high or better (get used to it too, because it's a bit touchy and fast), and just aim for the head. For zombies: keep running in circles (the maps are set up for it if ya notice. at least I did), always have plenty of ammo, use a solid weapon, and aim for the head. Also, save ammo when Insta-kill is going. I love to stab the shit out of zombies that way. Also, take advantage of the Pack-a-punch machine when you can.
That's my 3 cents. Lol. Can't wait to get an XBox 360. I'm gonna have to find the gamers on here and show y'all how an old-school gamer plays. Btw, I hardly ever use killstreak rewards. I get thrown off too easy for some reason. I did use them on MW3 (on the Wii), only because they help stack kills, but not often though. I usually just pick a nice gun, a set of sticky 'nades, and an RPG for blowing shit up. That any my claymores. God, I gotta go visit my son today. Steal his 360 and beast. Lol.
P.s. Any Juggalos on the PS3 and/or XBox: Join the CLWN clan. I started it up back in the WaW days, and it spread across both platforms. There's about 100 members or so. We usually talk on Facebook. If you suck, we'll help you get better. My part-time gamer tag on 360 is: PapaFish82 (I think. I haven't played in a whole week and it's a new GT)