Blood Elf all the way! That 2 min. silence comes in handy all the time for interrupts on heals. (Emergency mana for when you're too low on life to Life Tap) +20 Arcane resist is great against Mages, Balance Druids, and Arcane Shot. The Orc spellpower racial is good, but it's on a CD. Blood Elves, being able to use Bloodthistle is just as good, if not better, holding a steady 10 spellpower for 10 min. The downside is that you should have a good amount of Bloodthistle with you before entering a BG. Otherwise you're stuck with the withdrawal debuff (-5 Intellect). The orc pet racial isn't very noticeable on a Warlock, and you will find that your pet is easily killable. You should be buffing yourself before your pet. Perhaps if Demo was viable, then maybe focusing on pets would be something to consider. Trolls are a great class as well, and it's really all in preference at this point. Troll zerker + lb makes your DoT's tick faster (lovely PvE racial), and good for spam fearing. Faster health regen, and 10% during combat doesn't hurt. Da Voodoo Shuffle, Trolls be flippin' out mon! However, in my experiences of playing a Warlock at low level, the benefits of a Blood Elf are superior in PvP.