A favorite one is the biographical detail that excites the therapist. As in I'm too tired to wrestle with my real personal demons and core trauma, so today I'll regail you with more sexy-times adventures spanking people to get laid. To which my intern therapist bounces eagerly like a puppy ready for walkies.
The least favorite is the intern freaking out about childhood sexual assault thirty years ago and calling the authorities. Dude, the perp is dead, no one cared in that era and you just invited guys with guns to investigate my family. Your psychology career is off to a great start.
Nothing's more damaging to trust than opening up to someone about something fucked up that happened a decade or so ago that you've moved on from, only for them to comically overreact and start acting like this is something that desperately needs to addressed here and now.