Regardless of the song, I usually enjoy blatant endings. Not just tunes that "end on a period", but more specifically songs that have a coda of some kind - or even a quick 1 or 2 measure ending-specific "section".
Ending on the song's signature riff, or progression, can be cool. But also when said riff is slightly modified and reprised, it's usually cool (e.g. Spirit Of Radio).
Fadeouts don't do it for me, as a rule.
I've always enjoyed the full volume slash of "I Want You (She's So Heavy)". For that song, it's the perfect ending.
