The classic 1980s series featuring a gloriously bemulleted Canadian scientist-turned-spy called Angus MacGyver is so ingrained in our collective pop culture consciousness that the character's name is basically a verb now. You might not remember the plot of a single episode from the series' seven-season tenure, but there's a fair chance you've never once grabbed a Swiss army knife or a roll of duct tape without at least passingly remembering some weird construction ol' Angus MacGyvered (See?) together to fight whoever the shit it was he used to fight. Decepticons?
Also, The Fonz produced the show for some reason. Don't tell me that doesn't count for something.
Why It Must Never Return:
Sadly, MacGyver would be far from impressive these days. Sure, dude was more or less the first TV character who could construct a tank using nothing but a hairpin and seven feet of gaffer's tape, but now fuckin' everyone is doing it. It might not be highlighted to the extent MacGyver did it, but name a show (or movie, or game, or whatever) that doesn't feature at least one character who is able to ass-pull ridiculous gadgets with minimal resources whenever necessary. Shit, Iron Man 3 featured an entire act where a temporarily armorless Tony Stark played the role of MacGyver-with-a-dickhead-beard -- and made his way to what he thought was the Mandarin's lair in this capacity. It's an effective character archetype, but there is such thing as overuse.
Even bringing Richard Dean Anderson (who's now more associated with his role in Stargate, anyway) back in the game would be unlikely to do the franchise any favors, especially as recent photos indicate that the man has become a card-carrying member of the prestigious Val Kilmer Blobfish Imitation Society, which would not do the active-to-a-fault character any favors.
Yes, your childhood heroes age, and yes, it means so do you.