Hello all! This is my first post here! I have a burning (newbie) question. I understand the difference between lenses such as the nikkor 18-55mm kit lens and primes such as the 35mm 1.8.(speed of lens, focusing speed, and sharpness) But my question is simply; do I really need one? I have heard rave reviews about this lens, but if I shoot with my flash while I am indoors, will I really see a difference? Or better yet, where would I realistically see a difference. THanks in advance, Joe.