I rarely spoke in my mic during raids, but I'd constantly be talking to myself - mainly cursing, laughing, etc. One time, during a particularly annoying raid, my brother came into my room and said "lol you must really hate that game. Every time you play or talk about it, you're upset." The more I think back on WoW, the more I realize he was somewhat correct. Raiding can certainly be a glorious, entertaining, very fun thing. But it can also be one of the most frustrating, annoying things you can do online.
Some of my favorite gaming moments EVER occurred during raids, be they actual game events or achievements. The first time I did Naxx blew my mind. I still remember doing Patchwerk with about 4 tanks, and all of them dying except the MT and me; I had shitty gear but was good enough to survive, and basically made a name for myself during that raid. Or later when I became my guild's defacto main tank. I can't forget Ulduar, especially the hard modes, and how we spent months doing it and having fun.
But I also remember countless arguments, guild drama, people being jealous of loot drops, downtime, etc. A lot of guild members were people who worked late, or worked mornings. Imagine working all day or night, with your sole motivating thought being "I can play WoW when I get home" lol...then once you get home you can't do anything because the raid was cancelled, or the raid was delayed due to someone being AFK, etc. I witnessed more than a few players like that completely explode, rage quit, etc all over a video game that took over their life.
TLDR Ruzbeh: You should raid, it's easier now due to LFR. But downtime sucks and isn't nearly as glamorous as you'd think. A good raid can be some of the most fun you'll ever have gaming. Or at least, it was back in the day. Now...who knows.