My eldest has said she isn't bothered about going to her graduation. She just isn't really the celebratory type. Ever since she was young she hasn't liked making a big deal of her birthday because she hates being the centre of attention. It's not like she is completely adamant not to go but she is completely nonchalant about the whole thing and would rather be off travelling (which she intends to do for the first 6 months after finishing uni).
I'm completely fine with her decision as I am the same way myself. I hate "all eyes on me" and eloped for that very reason. My DH planned a surprise party for my 25th (a few months after we started dating) and let's just say he has never done it since!
My younger DD is the opposite to myself and DD1 but I completely "get" her and understand it just isn't a big deal for her. The thing is my mum and a few friends have said how I should really be encouraging to her to go. I met with some girlfriends for dinner last night and told them she wasn't going and they were all shocked and saying things like "no that's such a shame she must go!!" etc etc. I certainly don't want to force her but I am now worried she may regret it if she doesn't. She's said she knows a few people who aren't going and its not uncommon to not want to. If I had gone to university I don't think I'd have wanted to go to mine either but my mum/girlfriends are making me wonder whether I should at least try and encourage her to go?