My current set;
Warrior. My main. Run a regenerateable build. I stick to Greatsword / Longbow, and have for over a year. Before that I had a shout healer build, which I really liked. Before that I had an Sword/Axe / Rifle build which was for mobility, farming.
Necromancer. I'm not good at playing her, as she was mostly done Minion-mastering in a cookie cutter build I saw on reddit. The thing is, that I levelled her with crafting. She is really cool but I am gonna change her soon to something else. I'm thinkg some sort of debuff madness machine. I'm a fan of the staff and the warhorn, but I also quite like the scepter.
Guardian. What I have used the most. He was leveled from lvl 1-80 in WvW and PvP. He runs a great group shout healer build. The gear is a mix of strength/toughness/healing. It makes me very vulnerable to debuffs, but I can take a punch and be a frontline healer character. I have some cleaning buffs, so I remove conditions and debuffs when I use my shout. Im using the greatsword and staff but sometimes I swap for scepter/shield. I love this character.