Don't call yourself an otaku if you haven't yet watched Lucky☆Star.
This anime really gives a true insight into what anime is supposed to be with super unique characters with a variety of different personalities, adorable characters designs and humour! Alot of people who say lucky star is " boring " can't go 5 seconds without pantie shots or fanservice..but in all seriousness watching lucky star was the best decision I've ever made from the 1st time I watched lucky star I became hooked and still am to this day with a collection of various figures and merchandise from this anime and I'm sure you would love it just as much as myself especially if your a fan of the otaku lifestyle ! :D