Thanks everybody.
I did *another* fresh install and this time the system boots after
installation.
I have done 4 reboots. Each reboot was after modifying a file in /etc
(sudoers, /mail/aliases), and adding programs.
I don't know why the system wouldn't boot after previous upgrading and
then fresh install, but it seems to be working fine now. I also saved
dmesg immediately after installation, and then after the first reboot.
Now to get back on openbsd and get mutt set-up :)
Thanks again Jan, Nick, and everybody else.