Depends on the mood but these are the ones I usually go to.
I have many, many different versions of each film but these are the ones I watch most:

The Phantom Menace:
VHS or BD.

Attack of the Clones:
VHS, ADigitalMan’s Extended Version or BD

Revenge of the Sith:
VHS (yes, really) or BD

A New Hope:
'92 VHS release (OOT), '97 Laserdisc or '06 Limited Edition release

The Empire Strikes Back:
'92 VHS release (OOT) or '11 BD

Return of the Jedi:
'92 VHS release (OOT) or '06 Limited Edition release

The Force Awakens:
BD, if I have to…

I very rarely meddle in fan edits or preservations, the only ones I regularly go to in that regard are the ADM Extended versions, but that’s it. Part of being a massive SW home video collector also includes an annoying tendency to not want to watch any of the films in a format other than official releases, for reasons that make very little sense.