I solo played for a long time. I added a backup healer so I could do elite quests (used to be a lot back in vanilla WoW). Then I added a DPS so I could do the elite quests easier/faster. I tried to do an instance, but with only 3 people, you really had to outlevel the instance so much, it wasn't really fun. So I pressed on and got a DPS and a tank. It made all the difference. I could isntance whenever I wanted. I could do group quests and fight elites whenever I wanted. About that time, Blizzard ganked all the elites from vanilla. But I really liked doing the instances. So I grew up from solo to 5.