I've had two of the most creative and rewarding 'projects' when I partnered (as a writer) with gay guys who also happened to be close friends.
While the fact that these guys were gay probably impacted what we did far less than the fact that we were friends and of a like mind on the music we wanted to create, it also probably
did open up creative points of view that were, for lack of a better way to say it, interesting and probably would have been overlooked or not even considered had there not been a gay participant in the process.
Since both projects were focused on producing solid foundation material for pop/rock/alt and even a little fusion and jazz - and involved lyrics and story-telling and dealt with common song themes of love, pursuit, relationship, etc... the fact that there was a 'gay factor' and a 'straight factor' caused us to explore interesting ways of expressing things that were not 'gender-specific' and could be taken 'as is' by the listener.
Another thing that (in retrospect) was probably influenced by the 'gay factor' was a willingness to explore presentation styles that might otherwise get passed by due to their perceived 'feminine' touch or sound.
I know for a fact that we were always aware of the 'gay/straight' aspect of things - in the music, in life, in general. The fact that we were working together on a creative project almost demanded that we pay attention to such things - for lots of really good reasons.
I know for a fact that in my other bands where there were no gay players we rarely ever wrote a song that had a 'feminine' flavor. If it was a ballad, it was a 'male sounding' ballad - like that... If someone wrote something that sounded 'gay' - it'd probably get 'straightened' mostly since no one in the band wanted to put out the perception of being gay - whereas in the other project, it'd have stood as-is.
Because of my relationship with gay musicians, I learned to really dig David Bowie, Adam Ant, The Smiths, Brian Ferry and so on - from more than simply a musical angle. The androgyny factor - straight men in makeup - how to create shock and intrigue - how to be risque - and again, all of this is not 'gay-specific' - plenty of straight people discover eclectic, androgynous stuff too - but in my experience, it was my gay friends who turned me on to these things.
Now I've also explored writing 'feminine' sounding material with straight people too - so it's not exclusively a gay or straight thing - mostly just the willingness of the participants to express themselves that way - but in my experience the sexual preference of my co-writers and band mates
most definitely had an impact on how we played.
And yes, some arpeggios in the right context, can sound quite gay! Just listen to 98% of what driving 'house music' and tell me there's no such thing as a gay arpeggio!
