My first was a Bard which I didn't like for a bunch of reasons. I did well with it though, but after a year or two I restarted with a Necro. It is the best thing I have ever played even today. I could mez, I could pull with fd, I could heal myself with taps, I could do good damage, and it was really mana efficient. I could also solo really well, I could solo nameds and go to places that only groups would go. It was amazing to solo, but I loved it in a group too, I just felt so useful although a lot of people didn't feel the same way. I usually got ignored for groups because people preferred a druid or wiz for evac, then they would come to me hours later for me to summon their corpses...
Much later I started on another server and I played as an Enchanter. It is my second favorite class after the Necro. Charming solo is so challenging and fun and rewarding. And like the Necro I felt super useful in a group, although I preferred the Necro.
If I had to single box on an Emu I would pick the Necro, but in modern EQ it can't mez so I would pick an Ench or Druid.