TofuBunny - I'm glad I don't get that feeling with my favourite artists. My #1 favourite group has been KAT-TUN for years and I still get giddy whenever they announce something new.
setsuka - I don't feel they lack depth purely based on their lyrics, but rather based on the number of people involved in their music. IMO, a song's meaning feels less and less genuine the more people are added into the mix because it feels more staged/less realistic. And sub-groups wind me up because I can't keep track of them. Actually, I just can't keep track of their members in general (except for one or two who I've seen in dramas).
