1) Don't blame ya on the Power Rangers thing. From my understanding, the series had been mostly abused during the time the license to the series was under the control of ABC/Disney when they bought it from Saban. Largely by putting it in a terrible time slot which would often get it preempted by Football or Golf special showings. It was only until recently that Saban has bought the rights back and let Nickleodeon show their new episodes, so it's being given better treatment now. Personally, I never much really cared for the series after I reached by teens and I honestly wished it would go away for a while. At least for two years so people could actually start to miss them. Between the time the rights were being transfered from Disney to Saban again and Saban finding a new network to show the series, thus no showing of Power Rangers were happening, I thought it was a nice breather for a while for television, but I wished it lasted longer.
2) All I can say is that while I do like MSNBC, it's heavy liberal leanings makes me consider it's best to try and balance that out by watching other 24 news networks at times. At least one or two of their programs every now and then. Perhaps some Piers Morgan and Anderson Cooper on CNN, or Fox Report with Shepard Smith and maybe the O'Reilly Factor.
Also, after reading some of the comments on this forum about "My Little Pony," I haven't really seen much of the show due to not getting the Hub on cable where I live. From what I've seen of it though and looking at it's fanbase, Brony's, otherwise guys who are into the show fall into two categories. That one, that regardless of it being a show meant to be aimed to girls, that the show is funny and entertaining enough for some guys to find it watchable. And two, unfortunate "furries" who over sexualize the pony characters with fanart. Trust me, I've seen the furry fanart a little and it most of the time makes me cringe. Granted there is weird stuff on the internet, but I perfer the first type of Brony over the second. Oh, and Adventure Time is far better and I love it.
3) I read a bit of Manga here and there when I do get the time. Can't read all of them, and I wish I could, but even I don't often have the time to do so. But seeing as you do watch Adult Swim on Cartoon Network, maybe a "Cartoon Network is Weird" or "Adult Swim is Weird," given much of it's fanbase have been disappointed by the network with it's recent terrible treatment of anime on the network and investing in stupid programming like the "CN Real" BS. It's good though they're treating Comic book superhero cartoons better now, given how bad they treated "Justice League Unlimited" in the past, and now those cartoons are making a comeback with "Young Justice" and the new "DC Nation" block. Just hoping they'll give anime a nice comeback as well sometime in the near future too.
4) I like listening to a lot of music too, but I don't think a Big Picture episode is needed on the subject.
5) As much as I'd call myself a nerd, I unfortunately have never seen any of Doctor Who. Mostly for the same reasons as Bob said. Like to maybe sometime in my life, but not happening anytime soon.