I think my main questline is still stuck at "Meet Nick Valentine back at his office". Seriously, I'm running around doing Minuteman quests and clearing out random buildings looking for side quests. Did the USS Constitution quest last night, which was a blast. The weapon you get for finishing looks hilarious, can't wait to try it out.
I finally dumped my automatic pipe rifle. It served me well, but I hated the sight picture and it's damage was starting to fall behind. I got my Science to 3 and Gun Nut to 4, so now I can pretty much do anything to any gun in the game, so I modded out an assault rifle into my new mid range gun, and I've got the Spray N' Pray for close up damage. I think I'll go ahead and liberate the Castle tonight.