absolutely watch as much of Clone Wars as you can, assuming the arc grabs you. There are, as mentioned above, certain arcs that aren't by any stretch spectacular. On the other hand, there are some that are incredibly fantastic. Do not miss the Betrayal arc involving Ahsoka in season 5, and as I recall the start of season 5 is an arc in which a Clone Trooper malfunctions and goes Order 66 preemptively which was very cool too. Long story short, and what I tell all my co-workers about catching up on the series is...don't feel bad about skipping a few episodes here and there, but the rest is so worth it.