I was reminded recently of something which annoys me: if customers de-select Interests via TNEW, the Interest isn't set to selected='N', they are completely deleted, presumably along with any weighting information that might have been added. This seems wrong to me, so I've added a feature request in the Ideas list:
TNEW's Interests form shouldn't delete Interests from constituents accounts
community.tessituranetwork.com/.../tnew-s-interests-form-shouldn-t-delete-interests-from-constituents-accounts