I'm a Tales fan, so I'd like to join!
I own both Tales of Symphonia games but so far haven't bought any others, though Tales of the Abyss appears to be available for DS or 3DS cause I saw it with those games at Target the other day. Someone told me Tales of VS. is good.
I also have seen the OVA for Tales of Eternia and the first episode of the Symphonia OVA. Very well animated, especially the Symphonia one. I also am a big fan of the Symphonia OVA's opening theme, "Almateria," despite its odd mish-mash of lyrics from Japanese, English, and who knows what other languages. And I actually enjoyed the Eternia one even though I've never played that game.
I've beaten Tales of Symphonia a couple of times already; I maxed it out at 104 hours the first time because I did all the sidequests (including Niflheim). I'm playing it again so I can have game clear data to start a new game of Dawn of the New World with, since it prompts you for this when you start the game.
Like someone else said, I dislike Lloyd's new VA in Dawn of the New World; his old VA was just fine. Don't know why they changed it. I'm also not a huge fan of the Wii controls for that game, using the Nunchuk to move and the Wiimote for everything else. It's pretty confusing.