Can an expert (ie, somebody who knows what they are talking about) tell me what time this will start to get exciting.I'm not an expert, but...
There's nothing to see until about a minute before the landing. The only reason to watch earlier than that is to hear the radio chatter between the Shuttle and ground.
And, frankly, the launches and landings all look very similar (except, alas, for the last Challenger launch).
STS 107 Columbia, February 3, 2003