Common anything is better than where I am now.
common values. Exploring each others interests can be fun, arguing about your values..not so much
Common values are of more importance but this being said loving the other person means doing things the other likes too. If you have to be told or feel forced (obligated), it's close to the end.
Values set the cornerstones but you cannot build onto that without actually being able to cement it all together so shared interests are important but without the same basic values you are lost anyway.
Wow. Tough one. Gonna go with values, if I have to choose. Rather have both. :)
Common values. If we don't appreciate same values, imo we can't find common interests.