I use ternary form occasionally, and realistically there is nothing wrong with that. The form is appealing to a wide array of listeners, but there are definitely a few ways which we can consciously avoid it.
Basic example:Lets say that the song starts with a dark theme. (minor chords, not too dark) You might consider modifying one section to be congruent with a diminished vibe (place the focus on diminished octave shifts so that you can get creative with the voicing of the other chords you are using in this section), gravitate back to the "I" but sneak it in so it doesn't appear cliche. At this point we have three distinct sections instead of two and the sections can't be confused with ternary form.
It is so difficult to get past being stuck in a particular musical form because your own ear gets used to the specific mood that you create in the songs you are writing. Step back from the music you are writing for a minute and don't be afraid of a second opinion even if that opinion comes from an unexperienced musician.
With every genre I write, I try to experiment with a different form. In my older electronic music, I utilized Rondo Form, which at the time was kind of unique and unheard of because the general concencus was that techno was repetitive and boring. When I write, I don't consciously decide which form I'm going to write in because I feel like that will limit where I can go with the music. The form that the piece takes on will reveal itself to me when it's done.
I could go on. I love this thread already <3 and I can't wait to read what the other forum members have to say on this topic.