Humanities major -- great!
I double majored in hums and sci, and at my interviews, they were far more interested in talking about the humanities stuff than the science part. I feel very passionate about the stuff I did, that always shows, and they seem to like people who are passionate...
Also, if you are doing something "language/lit" heavy, it will help with the verbal MCAT no end. I think it is definitively easier to study biology and biochem to increase the score quickly, but verbal takes a lot more time and is a steady process. Def. 👍 for the hums major. You might have also noticed that the preparation books (no name mentioned) for the verbal part are usually very thin... because there is no list of concepts people can study. Preparation for verbal is a process, cramming has little effect.
If you can, double major, but only if you feel passionate about the other major.
Good luck!