I played WoW back in the day... before Cata, WotLK and BC. Been there from the start. I stopped playing before Cata came out - realized paying for a game every month was stupid. As a death knight, you will not have a main role in groups unless you do spec tank. Even then, there are probably better tanks, as you need to know the fights and what your job is (no offence but if u aint good at killin u aint good at tankin). Honestly, death knights are one of the best Solo classes IMO and so just do the quests around your level or even a bit higher if you can find some. Do some research on a WoW database (Thottbot? Wowhead?) and find items that you would want/need. Do those quests. Also, find quests that give the maximum amount of experience for the least amount of effort. There are guides that you can research as well. I remember I used some of the leveling guides at wow-pro.com which seemed to work out nice. Maps on where to go, which quests to get, etc. If you are planning to get a druid to level 85 quick, that is the way to do it - follow the guide. Druid's are also sought after in groups because of the roles they can play (Healer, Tank, DPS). Depending on which spec you choose, you can just do dungeons all day and level up that way. Again - once you hit the level to gain Dual Spec, leveling will be easier as you can be DPS/Heals and do dungeons/quests and alternate between the two. Anyways, I wish I still played but I do not have the money nor the computer capacity to play such an in-depth and immense game as WoW. Best of luck to you and remember, you are there to have fun. It is not a race to 85. Enjoy the perks that come with the journey.