Like most people who have characters at max level, I've got several heirloom items and I have leveled several characters by suiting up and powering through the levels. Leveling a new character is basically just a race to hit the level cap as fast as possible. After the world revamp in Cataclysm, most zones provide great quest chains but with heirlooms, you hit the max recommended level for the zone before these chains are finished and you move on. As an experiment I tried out leveling without heirlooms again, just to fit the levels in. I realized that not only can I enjoy the questing again, but actually upgrading my equipment while leveling makes the leveling enjoyable, and without overpowered gear I actually have to focus on what I'm doing.
I am basically wondering if anyone else has found heirlooms to suck the fun out of leveling? Do people generally dislike leveling so much that you prefer to get it over with as fast as possible? Do you think heirlooms could be changed somehow?