My experience with many different cartridges, and preamps over the years has been that I tend to prefer 47K loading for MC's. Anything much lower than that has usually (not always) made the cartridge unnaturally thick sounding, with loss of fine inner texture to the sound. As Audiofeil says, it is really a matter of personal taste in the context of your particular system. If your system tends to the bright/thin side, you will probably prefer a lower load value.
My experience as well with Titan i and others in the past.