I'd say that it looks like it could be primarily sativa, though it looks to probably has some indica in it, too. I'm guessing you aren't sure what strain it is?

I like to grow indica-dominants, and have some experience with sativas. My sativa-dominants always tended to have fewer side branches, and usually made a mad dash vertically...but I had a few sativas thats sides filled out nicely. Those tended to have a chunky main cola surrounding the main stem...and fairly wispy on alternative branches, but still potent. My indicas generally stay squat and bushy, and produce several dense colas all over.

Maybe your strain is 50/50?