Console war - Wikipedia

Which console war do you like the best? Console wars can be a nonsense concept pushed by the corporations and fanboys but at times the competition has made the industry better for gamers. 

To me, there's only been two main console wars.

Super Famicom/SNES vs. Sega Mega Drive/Genesis

Xbox 360 vs. PlayStation 3

You can potentially bring up 

DS vs. PSP

PS1 vs. N64

The 4th generation tho I love 5th gen as well a lot. 4th is the most varied. Every console had its own unique library. Great exclusives on all of them. No bad choice.

Saturn vs PS1 vs N64. This was the one that set us up for modern gaming. Sega's surprise Saturn launch in NA made the Saturn bomb. But from this bomb Sega learned and came out with the Dreamcast which is an awesome system despite dying early. The death of Sega gave Xbox the room to fill a power vacuum (which is important because before Xbox, PC games were only on PC). Sony took all these tiny little studios and gave them money and code. They blossomed into the likes of Naughty Dog, Insomniac, Sucker Punch, etc. Nintendo invented the Analog Stick and revolutionized how 3D games would be played.

I don't believe the numbers with with ps3 vs 360, especially near the end. So many people I knew got hit with the RROD and rebought consoles along I'd believe the 50% failure rate, I think it got a bit one sided and had an illusion of even numbers. It was a good narrative arc though, the underdog comes back swinging and builds out reputation they lost something that could easily have happened this gen with Xbox gathering up steam again but with Indiana Jones numbers now, I don't see it happening. I'd love to know the factors why it isn't happening, perhaps people are just locked into the ecosystem on PS now and gamers are less fickle because of it, having those ps4 game backwards compatible probably goes a hell of a long way to keep people in Sonys camp so migration is less likely even if the other offers really good stuff and future promise. I would like to see MS doing better though, competition is needed for Sony to stay consumer friendly.

Super NES vs. Sega Genesis.

If you weren't there, you missed out. That was a pure war. The TV marketing was something.

I think I have to go with Xbox 360 vs. PS3.
In terms of hardware units, it is easily the closest on a global scale. It's also the first close console war that I got to witness in my life as SNES had already soundly beaten MD by time I was born. I consider the 7th Generation the first modern gaming generation. Online play was hitting fever pitch, digital distribution became a big thing (except for Nintendo), video apps were added to consoles, achievement systems began and so on.
The 5th Generation was pretty interesting because N64 took a while to come out and was promising at first. But once it was clear that the games would continue to be expensive and the third-party support wasn't as frequent, the 1-2 Punch of Gran Turismo and Final Fantasy VII made it clear the N64 couldn't win. Not even Banjo-Kazooie, Ocarina of Time, or Mario Party could help it catch up. And Saturn screwed the pooch early with its rushed surprise NA launch and the fact that it never got a main Sonic game. Add in the fact that it was also $100 more than PS1.
"$299".

PSWii60

Best era in gaming!

The 16-bit war was epic; SNES and Megadrive went at it with no holds barred, each constantly striving for that killer app that would give them the edge. Ultimately I preferred Nintendo's machine, but the Megadrive was a worthy adversary and an excellent console in its own right.

The 7th gen I also liked, because not only was the fight between 360 and PS3 intense, but the underdog Nintendo coming back from the failure of the Gamecube to snatch the crown was a great rags-to-riches story.

What about 6th gen Gamecube vs Xbox? They were really close in sales just like PS3 vs 360

SEGA vs Nintendo was so wild that it led to kidnappings from the Yakuza of a developers sister and Nintendo and SEGA faced each other in front of the US Senate. (SEGA has always been run by the Yakuza)