Damn....Like you, I've liked that series since I was a kid..Though I didn't get around to seeing the original movies until the mid 2000s. I like all of the original movies....It gets different and kinda weird as it goes on but still pretty interesting....Yea, the plot seems like somethin outta the Twilight Zone/Outer Limits...A human spaceship travels through time and ends up a couple thousand years in the future where apes rule and humans are their slaves.
Even though the plot was pretty crazy it worked...I mean, there were little things in the original movies that set the tone, such as the remains of the Statue Of Liberty in the 1st movie....One thing I always wondered was how would the apes and humans react if aliens landed in one of those sequels? Would they band together or would they fight amongst each other? Or the aliens could end up being benevolent..I dunno...Just a thought running through my head.
Even though I hate most sequels(or remakes for that matter) the 2001 Planet Of The Apes was a great movie. Hold off on seeing it til you watch every one of the original movies.
Just get comfortable, smoke a few joints and watch the sequels! Personally they're all worth checking out and piece together the story really well.