Before I saw your user-name my first thought was "hope"
How 'bout
Entertainment
Achievment
Comfort
Occasional Happy-for-no-reason-ness
Dreams
And don't forget all the things that are simply better done alone (with nobody pestering, interrupting, monopolizing , spoiling, curtailing, ruining etc...etc...)
I'm most lonely when I'm at my job. I feel so left out and unappreciated.
(all those people, and none will even have lunch with me much less any off hours activities)
So my home alone time isn't so bad. (I think of it as solitude)