Here are mine:
Saints Row: Gat out of Hell - 2 years, 5 months, 3 weeks (+2 years, 5 months, 2 weeks)
Couldn't get into it, but wanted to come back one day and finally restarted it for New Years. And Platted it. Then played the rest of the series.
Batman: Arkham Knight - 1 year, 3 months, 1 week (+1 year, 2 months, 2 weeks) / 3 years, 7 months, 3 weeks (+2 years, 4 months, 2 weeks)
Came back to finally finish some of the DLC and to do miscellaneous trophies. Still not Platted.
Uncharted: Drake's Fortune Remastered - 3 years, 2 months, 4 weeks (+8 months, 4 weeks, 2 days)
Uncharted 2: Among Thieves Remastered - 3 years, 2 months, 3 weeks (+9 months, 3 days, 11 hours)
Uncharted 3: Drake's Deception Remastered - 3 years, 2 months, 2 weeks (+9 months, 5 days, 1 hour)
So I've been off and on these series for years but after 3 years I finally sat down to Plat all three, and I did. Still have the Speed Runs and Brutal Runs to 100%.
Borderlands 2 - 2 years, 7 months, 3 weeks (+2 years, 7 months, 12 hours)
Like Gat Out of Hell this was a game I just couldn't get into, but really wanted to retry it and loved it the second time. And Platted and 100% it.
Tomb Raider: Definitive Edition - 1 year, 3 months, 4 days (+11 months, 3 weeks, 2 days)
The online kept me from the Plat. Finally got tired if looking at an unfinished game I got with a group of players to finally get all the online trophies done. And Platted.
The Mummy Demastered - 2 years, 2 months, 1 week (+2 years, 2 months, 1 week)
Not sure why it took me this long to come back to the game. Busy with other games maybe? Well Platted.
BioShock Infinite - 3 years, 1 month, 1 week (+2 years, 5 months, 1 week)
Came back to finish both Burial at Sea DLCs. Still don't have the Plat because of the 1999 Mode Run. Lady Comstock scares me too much on the Mode. 😕
Doom (2016) - 2 years, 2 months, 2 weeks (+2 years, 2 months, 2 weeks)
Did the main online trophies first and it took me 2 years to came back and play the main game. And still have those two annoying armor trophies to 100% But still have the Plat.
Final Fantasy VII - 2 years, 5 months, 1 week (+2 years, 4 months, 2 weeks)
I was annoyed at the Corel's Angel trophy. That's it. Came back and like got it after my second race. And Plat.
Castlevania Anniversary Collection - 2 years, 1 month, 3 weeks (+2 years, 1 month, 2 weeks)
So I've been sick for a while and wanted to do something while I'm stuck inside. So finally finished this collection. I've finally beaten the first Castlevania. That took around 30 years. 😝
Fallout 4 - 5 years, 7 months, 2 weeks (+5 years, 7 months, 2 weeks)
A copy of Fallout 4 came out with my PS4, and it was the only game I had until the next day when I bought Arkham Knight. Only took me 5 plus years to get back to it.
And I bought the Season Pass 2 years after I first played it so I knew I would be back one day. And Platted and 100% the game as well. 😎