AP is doing pretty well as a second and third choice though, which would fit its reputation as a bit of an unpolished gem.
Really it's just Fallout and Star Wars eating up a lot of votes, which would make sense because they are very popular properties. I'd say it is less about sequels or other people's IP's, since Dungeon Siege, South Park, and even NWN2 aren't doing much in the way of votes.
You could also probably lump together all of the PoE (1&2) to show that their own IP has done very well in the poll.