Do you have a road/mtb bike? If so you could ride around on that in a select gear, find out what is most comfortable for you and then get your fixed combo to get the same gear inches.
i.e. a 44/14 setup is 82.6 gear inches, that is equivalent to riding a road bike in a 53/17 configuration.
Use Sheldon's Calculator to work this out.
I personally prefer to push about 70 gear inches but that's because I'm a spinner not a masher.