It's really hard to explain, but I liked it a lot better when Halo was the shooter king and not Cod, let me explain my reasoning.

 Nowadays, COD is the king. And COD comes out every year so i have to hear the damn press talk about it everytime a new one is announced and showed. and After MW2(which I didn't like too much) the devs stopped giving a crap and are now just releasing them for the heck of it. And instead of Devs trying things different to conteract Cod, they just try and copy them. We see COD clones instead of different types of games because it is too "risky" to release something unique.

Even though I found it annoying that people constantly felt the need ask me to play a game of Halo back in the day(they still do, but not as much), I felt it was much better than the recent Call of Duty trend. I felt at least Bungie put a huge effort into Halo 1, 2, and 3. And at least the games would space out a good three years before releasing, so I wouldn't have to hear about it constantly from press. And the Devs back in the day, would try to be different from Halo, not copy it. Im sure there were some Halo clones, but there was a lot more variety than the Constant "COD formula" of today. And whats funny is one example of different game that was awesome that counter acted Halo was Call of Duty 4, which ultimatly lead to this COD craze in the first place. XD

So thats my rant, which did you like better? When Halo was King or now when it's COD as the King of the shooters?

Nope, be careful what you wish for. YOu just might get it. I personally prefer the COD series to Halo, so not a biggie for me

I liked it when Duke Nukem 3D was king. Hail to the king baby!

Nope going to be getting Modern Warfare 3 soon and Black Ops 2 right away because I prefer the Black Ops series. Though I do think they should put out a game every other year I actually cannot think of many shooters like it besides battlefield that is a success. I actually think the Halo's coming out every 2 years as they have been is too much to hype me.

I still remember when fable was referred to as 'the Zelda killer'

Yes and no. I remember when every game was claiming to be a DOOM killer. I like all three game series though so it makes no difference to me.

Pretty much, but that's because I like Halo better, I've stopped buying Call of Duty games, and I don't expect to ever buy a new installement.

And i remember when Star Wars Kinect was the Uncharted 3 Killer in terms of quality.

There are so many people dreaming and probably high all the time.

CoD will kill itself - No one else can do.
Battlefield 3 is so much superior to every CoD but doesn't come close to its numbers cause it doesn't have the Casual appeal.Especially not cause BF3 is mainly build for PC.
Not even Halo has the Casual appeal like CoD cause it tries to tell an actual Story that isn't just about space marine gorillas or US Soldiers that kill stuff as brutal as possible.

I'm still waiting to see if anything kills Halo. :)

Really though, Halo has been around,  is around, and will be around in the future. :)