I did all four ME3 endings to see the different colours. Red was the best with green a close second. Blue didn't have the emotional impact of the other two colours.
I pushed all the buttons at the end of Human Revolution. They all gave generic stock footage and a voiceover.
But okay, in the spirit of the question, the majority of games with multiple endings are the larger RPGs and I have replayed them. I've completed most pre-EA BioWare games multiple times, done that as good/evil, female/male, etc. Some of them can have quite different endings. For example, ascending to Godhood in BG2, or staying with your lover gets some great lines of dialogue and the characters' fates can vary quite a lot. Jade Empire had a huge tonal shift depending on Closed Fist/Open Palm and whether the player romanced Silk Fox. Not to mention the NPCs that didn't make it in the "evil" ending. I did play ME3 once with a modded ME2 save wherein all teammates died on the suicide mission.
I've done BioShock harvesting and saving the Little Sisters. I did all endings in the original Deus Ex. I did high and low chaos Dishonored runs. I've done multiple Alpha Protocol runs over the years. I've linked and usurped the first flame. I did two playthrus of The Witcher to side with each faction, the humans and the Scoia'tael (really, really interesting to interact with Alvin and later, Jacques de Aldersberg, brilliantly well done). I've done all the Mass Effect and Dragon Age: Origins combinations, all Fallout: NV factions (except Legion) and all Fallout 4 endings (I reloaded to the point where you have to choose and replayed the endgame from there).
To be honest, there's more fun to replay a game because you can experience it differently. Warrior vs Mage, Shotgun vs Sniper, Rogue Vs Ranger, that kinda thing. I wouldn't replay just to see the different endings usually, but might do so if I was replaying anyway. Where it allows, I might reload a save just before the end to watch them all, or in the Internet age, watch it on YT.