I'm always suprised to hear people complain about not being able to solo or not being able to play casually.
The thing I like best about this game is how casual-friendly it is.
I can literally log in for 15 minutes and get something accomplished. That was NEVER true in EQ1. In EQ1 I always felt that anything less than 2 hour sessions was just pointless.
In EQ2, you can often join a group for a specific objective, 1 mob or a set of mobs, and then leave. Nobody gets upset that you didn't stay for 2 hours, nobody else is staying either!
In EQ1, I would join a group, and as a cleric, felt obligated to stay at least a couple hours, often 4 or 5. I just don't have that time anymore.
In EQ2, I will join a group, and as a cleric, feel obligated to finish ... well nothing. I often join a group for a few encounters. Or for a half hour. Everyone parts company happily.
Sure a healer is useful, a healer is even necessary at times. But druids and shaman are healers too, in this game . Its not cleric centric, at least not so far, and I'm in the high 20s now.
Maybe all that changes at 50, who knows? I don't.
My paladin is 28, and can solo fine, but loves to duo with a healer. But yes, I can solo easily. I have some decent damage, some good defensive skills, and a solid heal. I can't kill anything anywhere anytime, but I can certainly pick my mobs and kill a decent amount of stuff.
Plus, I NEVER stay in one spot for long. EQ1 was
1. Find a group. 10 minutes to 2 hours wasted
2. Go to a camp. 10 minutes to 2 hours wasted (depends on how hard it is to get to, obviously, and who dies along the way)
3. Sit at that camp killing the same stuff over and over, probably trying to spawn a named.
4. If you are "lucky" you get trained by some other group that wanted your camp, and it at least breaks the monotony, or the one complete moron in your group ends up getting you killed in some way.
In EQ2:
1. Decide what I want to kill today based on the amount of time I have available, and probably based on which active quest(s) I want to advance (often several at once0.
2. Go there. Kill things.
3. Move on to another quest, if there is time, or log.
All this in anywhere from 15 minutes to 3 hour increments, depending on what *I* feel like doing or have time for, NOT dependent on some obligation I feel because the game makes grouping so dang difficult.
EQ1? I've not logged in even once, not even to give away my stuff or say good bye to my old guild. While I like them and everything, every single one of my RL friends that used to play eq1 is playing EQ2, and all but one haven't even considered looking back.
ANY class can solo, and they are adding more solo and duo content every day. I love this.