I've been noticing a trend with the majority of my guild mates. Very few make it past the 30's before starting a new character. I even heard one make the remark that they lose interest in their characters when they hit 30. Looking at my own alts, I have several between 29 and 35 that I haven't played in quite awhile and actually dread logging in.
EQ2 is designed in such a way that things get a little tougher as you level. I find the starting areas to be very fun. I absolutely love Antonica and the levels there go too fast. The area is wide open and huge, with lots of quests found in various spots. From there I used to move on to Thundering Steppes, which starts to get tougher to navigate with heroic mobs placed here and there. However, these days with the Faydwer expansion, I move on to Butcherblock to draw that fun out for a little longer.
At 30 you're left with Enchanted Lands and Zek. For a soloer, Zek has a limited number of quests. The front half of Enchanted Lands has a number of quests; however the second half of the zone is nearly all heroic mobs. Except for high level harvesters, this section of the zone is usually empty. There aren't enough quests to get you through the 30's unless you group, which is rare these days, so it's time to do a bit of grinding.
At 40 the only option used to be Feerrott, since both Lavastorm and Everfrost are all heroic. In Feerrott, you only have a small portion of the zone to work with as a soloer and must do a lot of dodging to get some of these quests done. Fortunately, Steamfont is now an option. But by the time 50 rolls around, I'm just really done with this zone.
The 50's and 60's get even more cumbersome. Leveling becomes more and more of a chore as you progress.
I really have mixed feelings on this. I'm one of those who likes to stick with one character when I start a game and see it through to the end. I use that character to make money and then buff up my alts so they are not such a struggle to play. Even though it's grindy, I'm just stubborn and determined to see it through. And when you get to the end, you sort of go "Whew, I made it". In WoW, when I maxed was more like "Ok, now I'm up here with everyone else".
But how many times will people keep rolling alts that make it to the 30's before they tire of the game and move on? I don't want them to make it as easy as WoW, so the server is full of level 80's. They'd have to add new zones just to add more harvestables to accommodate. Getting some things done would become a nightmare. But I think something needs to be done from the mid 30's to 70 just to make things more fun and tolerable. I'm really hoping the expansion they're working on addresses these levels, rather than add more little used raiding zones.