If you roll without being asked, you risk a critical failure on a task that may have been a gimme. I usually ask when the task impacts the story in a certain way. Attacks will always be rolled, some others will only be sometimes. Right now, the situation is set according to how I want the begining to procede. If you try a complex action, I might just roll it for you in your private thread (so you can see) and then post the result IG.