I have done my share of both travelling alone and with company. I now prefer travelling with company. It is just more fun to share the experiences. You also eat better when you have company. Alone, it is just to take nourishment, not to enjoy the experience.
Haha I totally agree with the eating part. You take more the time for it and talk about the experience while eating :)
For me if the option is there: travelling with a partner all the way!