There's overlap between the three. And the best episodes aren't that far apart... Inner Light, Year of Hell, The Visitor, Best of Both Worlds, Scorpion... they're all up there.
For me it's purely a character/location thing. I like to spend time with the crew of Voyager and I like to feel I am onboard Voyager.
That Voyager has the characters with the most potential often squandered is besides the point. I like Janeway, the EMH, Seven etc.