I have asked my T to suggest a topic several times. Her response varies. Sometimes she will, sometimes she won't. I think some of it has to do with how I approach the request...if I genuinely don't know what to talk about, she's willing to help out. If it seems like I'm asking her so I can avoid something, then she won't. Once, she just said she didn't feel like picking - she even told me she wasn't sure why she felt that way, but that she felt it was important for me to choose (that was when I had two topics I wanted to discuss and couldn't decide where to start, so I asked her to pick).