Regarding the 2 figures, the best thing to do is remember that they're not real. You can command bad DCs or creatures to go away and they probably will, brownie points if you have enough conviction and expectation that they'll go. As for the dark basements, I'm the same way. I simply look away (making sure it's completely out of my sight) and when I look back, I expect the lights to be on. Either that or I just go for it and pretend nothing bad could be down there. It's like walking around the house with the lights off, just on a higher and more supernatural calibre.

1.What lucid environment would you most prefer?
I like to be in my school because it's very wide open. I also like being in a wide street in the city, or in a well-lit park.

2.What are YOU afraid to do in YOUR lucids?
Be very afraid of something scary and completely fuck up a dream I could've made better.