“Doctor Who”. It’s the one major part of geek culture I sorely lacked experience in. Before I was introduced by a friend, I really had no idea what Doctor Who was. It looked cheesy. It looked low-budget. It looked stupid. It looked like all those science fiction movies MST3K made fun of + special effects from a live-action children’s show. Neil Gaiman said he (like other British people) watched Doctor Who sitting hiding behind their couch, peeping out. I never understood why. Now I’ve now finished four seasons of the new “Doctor Who” series (on to Matt Smith!), and finally feel sufficiently versed to give an opinion. I wanted to…