If we're talking VTSC too, I'm gonna go with Han's trenchcoat.
The coat has working pockets for christ's sake! How can you not love that? That's incredible if you ask me, to come out of a mass production toy.
The Geonosian Weapons from Sun Fac are nice too... I mean, Hasbro made a staff that doesn't need Viagara... Where's the love for that right there? I applaud them when they do it, because god knows they don't do that nearly often enough.
Lushros's console is a good one though... It's simple overall, but it's the kind of thing you want more than one of.
I'm ok with being underwhelmed by accessories if the figures are great... Unfortunately TSC's been somewhat of a letdown to me because figure quality isn't on the up and up as it should be. It's a notch below 2005 overall I think... Some hits, lots of corner-cutting though, and so the accessories stand out as not all being fantastic. I mean, Derlin coming with the crappy sculpt of the Rebel Blaster from the POTJ Fleet Trooper, and NOTHING else, is kind of dull... If you're not going to give the figure a little extra umph in articulation, then give him something special as a pack-in... A cargo box perhaps, or *gasp* god forbid, the Sensor Screen from Riekean maybe? But I guess if Riekean didn't even get that, Derlin wasn't about to.
Anyway the point is, they have it, it's "on-hand" to be made at their whim... Sometimes that little extra value packed in at no major cost impact is enough to make the figure go from "eh" to "yeah!" pretty fast... Not always, but sometimes.