For the first time ever, I had taken Imoen out of my party for my first solo run. Even if you don't dual Imoen to a mage, she still has this unnamed magical ability I am calling "Power Word: Guilt". Regardless of hit dice, and with no save, it makes you feel like crap when she drops a:
"Just...just like that? But we are friends and everything! Been friends for years! I guess...I guess I'll just wait 'till you need me again, because you will! Just wait and see!"
which is further exacerbated with an unavoidable flashback to this scene in Labyrinth:https://youtube.com/watch?v=8hjepidj3I8
and it has progressively sucked the fun out of my cleric/thief solo.
So yeah, I don't know why, but every now and again in my life, I need you Imoen.
I didn't get far (barely to Nashkel), but I'm now restarting this character. Same character...minus the being an apparent douchebag for leaving Imoen behind.