My favorite class has drifted like crazy over the years. Overall and in general, I'd have to go with Rogue. I just like being "the competent one," so to speak.

Also, without a spell list for a tool kit or insane combat prowess, the class forces you to think IMHO more than any other, with the massive skill points helping you to be the party specialist at...nearly anything.
That said, I've played a lot less rogues the past two years, and when I have they've often had some kind of swordsage mix and/or variants like martial (feat) rogue, making them not
feel like a typical rogue. In fact, my last rogue was 1/3 barbarian with the feat variant, and by the wayhe played, most assumed it was the Rogue side that had only a few levels. Some months after he was created were shocked to learn he was a rogue at all!
I had an arcanist phase, playing lots of sorcerers and wizards, inmany of the cases because it was what the party needed. Which in the end is what drives my class selection more than anything, since i'm basically cool with any archetype. More recently, I've been with groups where no one wanted to be the healer, and have had several druids and a cleric, which until the past year I actually had little experience playing. I've really grown to love the druid, I think I like that class as much as Rogue now.
One odd similarity between the large majority of my characters is the nature motif -- Druids, Wilderness Rogues, Barbarians, Rangers, Scouts, etc... make up the bulk of my characters played. Even others find ways to end up with that theme.My previousWizard went into Stormcaster, for example. Before him, I had a Sorcerer who at first only bothered to learn/care about nature because he met this cute druid woman and wanted to be able to show interest in what she liked. He gradually evolved over the campaign until he was a full blown "defender of the forest" type outlook. It's strange, in real life I have allergies to nearly everything outdoors and avoid the sun as much as I can, so in that respect my characters are nothing at all like me.