Just to join in the fun and dancing:
Three machines: one home-assembled desktop (i5, 8GG RAM, etc); two Dell laptops: D630 (Core 2 Duo CPU, 4GB RAM; E6220 - i5 CPU, 8GB RAM).
Started w/ the Desktop and made three efforts; on the first, it ended challenging me to remove a perl-DBD-Pg-Test-FC21 package; on the second, to remove google-earth-stable, on the third, it completed correctly.
However, on each try, a full download of all necessary packages was necessary, requiring two hours each time (old school Verizon DSL).
(Was it necessary to do complete downloads? Couldn't these things have been cached for the next effort?)
Having learned the lessons of upgrading the desktop, upgrading the E6220 from F22 to F23 went correctly.
The D630 needed to move from F21->F22->F23. The problem there was that on F21, the Postgresql database version is incompatible (don't have the numbers in my head) w/ that of F22 and F23. Somewhere there should be a preamble on the next upgrade iteration that these sorts of things (those PostgreSQL upgrades that require a backup-and-restore) need to be done prior to advancing in Fedora releases. A nuisance (given that I have backups and some experience) that probably took 15 minutes to handle.
fyi,
MP