Haha yep. Sit down and think to myself, I feel like doing some quests tonight.
Run out the front gate of Sanctuary and think to myself "Oh, the fields of fire on those auto guns isn't quite overlapping properly, I should fix that"... 3hrs later and I'm still screwing around building s**t at Sanctuary.
Yea it's a real bitch on the OCD. Last night I scrapped a large pre fab shack and put in place two small ones, because the large shack had a section that floated because of the unlevelled building ground.