AIBU? I feel like anniversaries are only really of interest and significance to those involved. Certainly I prefer not to receive cards etc from anyone other than my DH on our anniversary and have said as much to my family. Is it mean not to want to celebrate theirs either and to view it as a private celebration? My parents don't care. I think my Dsis does a bit.
In the interests of full disclosure I take birthdays and Christmas very seriously for my immediate family and friends, although I still don't do the sending-Xmas-cards-to-everyone-I've-ever-met stuff.