I always take pictures with people, it makes the pictures more personal to me and helps me strike up a conversation with someone who's costume I like.
My friend once said though "Why do you always have to take pictures with people? it just annoys them and they think it's weird, I can see it on their faces when you ask" which I personally think is a load of crap, since everyone I've ever asked has been super nice about it.
Working on:Weirdmageddon!Wendy-Gravity Falls, Revis/Levi Baskerville-Pandora Hearts, Oswald Baskerville-Pandora Hearts, Kirara Amanogawa-Go! Princess Precure, Mami Tomoe (Charlotte Hoodie)-Madoka Magica, Rintaro Okabe-Steins;Gate, Honoka Kousaka-Love Live! Gilbert Nightray-Pandora Hearts, Kitty Pryde as Star Lord-Marvel Comics, Natsumura Kusaribe-Zetsuen no Tempest,