Adrienne,

For me to attend a business conference, it must be local.
It needs to offer some sort of networking opportunity.
If there is good information - with one of more speakers and various topics, great. 
If it is a half day affair, that works really well.
If it is a full day (or multiple days), I prefer several "breaks" so as not to be sitting all day long.
Snacks and good food are always appreciated - and Coffee - all day long!