Oh I would. This place kinda got me started in music period. I taught myself a little piano from the sheets on the site, started arranging before I even started my current primary instrument (bassoon) in high school. Started learning theory from analyzing these sheets, then moved on to the musical academics in high school. Now studying to be a Music Composition major. Might head out to USC for grad school. They got video game composers there who teach and I could pick up film scoring techniques as well.
Probably tonal. Atonal has it's kicks though too. Depends on the performers and the audience though really, as all music should. If I'm writing classical pieces for a younger player or ensemble, tonal would be better. If I'm writing classical pieces for an advanced large ensemble, probably a mixture of both with more atonal than tonal. Advanced chamber music would probably be all atonal, as there's such a lack of those in the repertoires of performers for their specific instrument or small ensemble.
In the video game or film medium, it depends on the situation. Many new AAA titles contain both, some almost purely atonal during gameplay. So it depends on the situation there.
Long answer to your question, but to me, I don't mind writing either one. I want to write what's best for the performers, performance, and the audience. What about you?