IMO, 2006 was the last great year of the WWE.
It's like what
aa_sleepingpowder said, it had its ups and downs, but I feel like it had more ups than downs. Lemme explain:
Edge winning his FIRST WWE Championship. The first MITB cashing in that was actually cool IMO. This was The year of Edge as I saw it. He beat Mick Foley at WrestleMania and became a premier Main Eventer and never looked back. He also put on one of my favorite RAW segments with the Live Sex Celebration.
Mysterio winning the 2006 Royal Rumble and winning the World Title at WrestleMania.
The Amazing match that Kurt Angle had with The Undertaker at No Way Out.
WrestleMania 22. This Mania is pretty much in my Top 5. The epicness of the event speaks for itself.
Debut of Umaga.
The rebirth of ECW and RVD winning the WWE AND ECW Titles.
The return of DX.
The birth of Rated RKO.
Nobody's mentioned this yet, but what about Unforgiven 2006? The second best ppv that year next to WrestleMania IMO. I mean, Hell in a Cell, TLC, Trish's last match, Jeff Hardy's first ppv back in how long? Need I say more?
Also, on a personal note, Carlito slowly started his build to becoming a legit top face talent on RAW. I remember a promo he had with Mr. McMahon on an episode of RAW. I believe that was when Carlito officially arrived. The fans loved him, his gimmick had finally come to its peak, and he had improved his ring abilities. I actually had him pegged to win the Royal Rumble in 2007, but of course he got canned
Cena and Edge definitely had feud of the year, hands down.
Now, for the down moments:
Rey Mysterio's Title Reign.
The May 19th Angle.
The McMahons vs HBK and GOD?
The Impostor Kane. They REALLY missed the boat on that one. If they were gonna do this, they shoulda brought in somebody that was at least the same size as Kane, or at least bigger, not smaller than him.
The Mick Foley vs Ric Flair feud. I don't know. I feel like that feud could've been so much better than what it was.
Oh yeah, and December to Dismember. Yeesh.