I'm with the "yes, go to Church" crowd.
The problem with the notion of being a "rogue Christian" is that you have no grounding. What I mean by that is that Scripture is huge, complex and sometimes a bit confusing. Most individuals are not equipped to really understand it all on their own, and even if they were, as humans we tend to bring our own experiences, perspectives and expectations to our understanding of these things. Put 10 people in a room with identical copies of the Bible, leave them alone for a week, then come back, you'll find 10 different perspectives and sets of understanding.
It's only with the guidance of the Holy Spirit, along with fellowship with others, that we can remain grounded to the meaning of Scripture.
Also, by gathering together as a group we recharge our spiritual batteries. After a week of being relentlessly bombarded by this world we live in I welcome the chance to spend time with my Church brothers and sisters.
I mean no offense when I say this, but in my experience most of those who say "you don't need to go to church" are people who are just rationalizing their desire to not bother going.
"He who takes offense when no offense is intended is a fool, and he who takes offense when offense is intended is a greater fool."
"Don't take refuge in the false security of consensus."