Unless I'm remembering wrong, while we don't really know what motivation is really driving her, Toda has explicitly said that what she wants to create -has- to be eromanga, I haven't seen any sign of that changing.
I think her motivation has a lot to do with Mukai Ryuuji (aka Rukai Yuuji).
The reason she took her works to X+C (instead of any other of hundreds of eromanga magazines out there) is because in her mind X+C is "Mukai's magazine" and she's chasing in his footsteps. She definitely wants to prove herself to him, win his approval and stand before him as an equal.
Well, at least that's how I read it. Mukai is Toda's biggest secret, one she has never revealed to anyone, not even Tanaka. You know how in Japanese culture "admiration" and "love" are closely related concepts with a very blurry border, don't you? I'm kind of eagerly awaiting the moment Tanaka finds about Toda's feelings towards Mukai -- to see if it will make her JEALOUS, mweh heh heh heh heh heh!
Toda dancing so happily gives me life.
Don't you love how she seems to be dancing with two girls? No boys around her.