An uninformed voter is only marginally better than one voting for a dem. I don't have the attention span to pay attention and get up on all the issues, not to mention my memory problems keep me from remembering so much of what I read. I'm pretty sure I'm registered republican though, so blindfold me and point me to the right and I'll be fine...
Not everything needs an in depth study. Some things you just "know" are right and others are wrong. Usually it's local and state issues that are more detailed. On the Federal level we're just voting for people that most closely represent our individual beliefs. Oddly enough...I have seldom found one as conservative as I am.