I know I stopped talking about my solo/questing as soon as I started raiding, but I wanted to give you an update. I'm still questing.
I've continued working my way through the quests in Storm Peaks. The Titan Lore is really good and the quests are fun. There's even an Engineer only quest which rewards you with a schematic for a Scrapbot, which as far as I can tell is the new Repair Bot. Mats are fairly cheap only Saronite Bars.
One of my favorite quests has you doing battle with a Giant Robotic Gnome. And you thought the real ones were scary!
I've also reached the conclusion of the Thorim / Loken chain. Most everyone will start on the Thorim chain because it opens up the quests to start gaining Sons of Hodir rep. You continue the chain and ultimately there a mono y mono between Thorim and Loken.
But my favorite chain thus far has to do with the Frostborn Dwarves. Once you start doing quests for them they send you out to take their Warrior test. On the way, your guide starts describing events that have happened. I immediately recognized the character in the story. I could be wrong but I believe I've found out what happened to Muradin! I only wish there was someway I could tell him who he is, and what he's done! He should join us in our fight against Arthas!
I've recently started questing in Icecrown itself. The way the zone changes is just amazing. When I got there an Argent Crusade base was under attack. After we held off the attack, I could see the bodies of the defeated Scourge and the Argent Crusade fighters were cheering! An area that had been covered in Nerubian spider webs was ablaze from the battle. I can't wait to get back to Icecrown and continue questing there.
Questing doesn't have to end just because you hit the level cap. If it's something you enjoy, continue doing it. The quests in Wrath are extremely high quality and fun. The stories are engaging, and the characters memorable. Even if you don't need any of the quest rewards, there's still some rep to be squeezed out and achievements you can earn. You don't have to lock yourself away 24/7 in dungeons. Enjoy the full game. Blizzard put a ton of work into the quests, enjoy it!