E/VG, VG/E, E/VG awarded fellowship in electrical engineering. only 1 negative comment from third reviewer who asked how my research would serve underrepresented groups in society. (my proposal was about modeling of nanoscale semiconductors using supercomputers )
for IM: reviewers commented on my publications/presentations, past awards, and they also liked my international research experience.
i did an internship in germany. i think the int. experience really helped me, since i could also connect it with broader impacts. (e.g. cultural/scientific exchange, networking etc.)
for BI: lab instructor, k-12 teaching, mentor for exchange students.
i think teaching and mentoring are common among a lot of applicants regarding BI. but i guess the thing which helped me here was that i planned to promote scientific exchange between the US and Germany.