Between Randy Savage vs Ric Flair and Bret Hart vs Roddy Piper for me, but id just go with Savage i think. I like the Money Inc match too tbh.
"Maybe I will never be,
All the things that I wanna be. Now is not the time to cry. Now's the time to find out why. I think you're the same as me. We see things they'll never see.
You and I are gonna live forever"
I love the Piper Vs. Bret IC Title match and I put it up there with Savage Vs. Steamboat & Michaels Vs. Razor as one of the classic Wrestlemania IC Title matches. It was also a huge star making moment for Bret.
However, I also love all the drama and action given to us from the Savage Vs. Flair World Title match. That was an excellent encounter that, by virtue of not being the main event, caused the show to peak too early IMO.
Picking a favorite is tough, but I am going to give the slight edge to Savage Vs. Flair.
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Ohh this has to be Bret/Piper for me, I really loved that match in fact I remember really liking Roddy Piper at the time because first he came to the rescue of my hero, Hart at the Rumble and won the title from the Mountie and then he put the belt on Hart after losing this match to him.
I have stated on these forums many times that WrestleMania 8 is one of my all time favorite PPV's bar none and i can still sit and watch the PPV almost in it's entirety today. I loved Randy Savage/Ric Flair and Undertaker/Jake Roberts as whole feuds whilst Hulk Hogan/Sid Vicious did actually have me invested in it and i knew Bret Hart/Rowdy Roddy Piper would be good but didn't know how good. If i had to choose one i'd go with Randy Savage/Ric Flair as both men were still at their peak although at the end of it and out on a match that had you invested mentally and emotionally the whole way through and it was the best feud of that year bar none in all of wrestling.