Similar to a
memory trip, but, as the name implies, much more
self-centered, and possibly
more physical.
Some incredibly annoying people are on permenant ego trips. Wheee. They're fun to watch, being so absorbed in themselves that they can't even listen to anyone else speak.
Still, my philosophical piano teacher tells me that, in the end, nobody looks out for you or cares about you more than yourself. Perhaps being on an ego trip is better than having unrealized potiential.