If a pass-along can toss in his two cents:
A lot of good things have already been said on one's style. I reckon one can have their style endure across a wide range of musical genres. Looking back on the stuff I've worked over the past couple years, I've dabbled in a lot of approaches. Pure orchestral, orchestral with synth accompaniment, metal/rockin' stuff, attempts at symphonic metal, electronic music, even poked at some stuff with eastern instruments. If you find yourself in a rut with instrumentation, I'd recommend trying new ways to use what you got, or branch out (I'm an Eastwest user, the stuff is expensive if you don't catch it on sale, but I'd recommend the Symphonic Orchestra, Ministry of Rock 2, Silk, and Ra.)
As my bud pointed out, I find myself gravitating towards sounds I like: violins, violas, cellos, double basses, etc. Heck, I made a song for the OHC using just those, a piano, an erhu, and a little pad. Because it's stuff I enjoy listening to and (sorta) know how to use. Sometimes it's nice to fall back to familiar territory. My general principle is this: make music you would wanna listen to. Enjoy your musical roots!
But sometimes it's good to try things we aren't familiar with. For over two years, I've done co-op projects with Wassup Thunder. He enjoys doing the percussion, so I often let him have at it. But a while back, we wanted to both try our own takes on Ridley's theme (Super Metroid). I took the opportunity to force myself to take a percussion-heavy approach. It was rough, and I wasn't confident, but I think that every piece you work on teaches you something. Give it a shot! Start a project to focus on some beats, study the kind of music you like with beats, and make-a-some beats! You'll love it! Probably.