Snagged this from shadowkat who snagged this from colls. Filling this out for Fannish 50.

Bold = Watched Entirety
Italic = Watched Part
* Watched more than once.
† Watched in the first few weeks of release (at least initially, for TV shows).

Phase One:
*† Iron Man (2008)
*† The Incredible Hulk (2008)
*† Iron Man 2 (2010)
*† Thor (2011)
*† Captain America: The First Avenger (2011)
*† The Avengers (2012)

Phase Two:
*† Iron Man 3 (2013)
† Agents of S.H.I.E.L.D. (TV 2013–2020)
*† Thor: The Dark World (2013)
*† Captain America: The Winter Soldier (2014)
*† Guardians of the Galaxy (2014)
*† Avengers: Age of Ultron (2015)
*† Ant-Man (2015)
*† Daredevil (TV 2015–2018)
*† Agent Carter (TV 2015–2016)
*† Jessica Jones (TV 2015–2019)

Phase Three:
*† Captain America: Civil War (2016)
† Luke Cage (TV 2016–2018)
*† Doctor Strange (2016)
*† Guardians of the Galaxy Vol. 2 (2017)
*† Iron Fist (TV 2017–2018)
*† Spider-Man: Homecoming (2017)
*† The Defenders (TV 2017)
*† The Punisher (TV 2017–2019)
† Inhumans (TV 2017)
Runaways (TV 2017–2019)
*† Thor: Ragnarok (2017)
*† Black Panther (2018)
Cloak & Dagger (TV 2018–2019)
*† Avengers: Infinity War (2018)
*† Ant-Man and the Wasp (2018)
*† Captain Marvel (2019)
*† Avengers: Endgame (2019)
*† Spider-Man: Far From Home (2019)

Phase Four:
*† Black Widow (2021)
*† WandaVision (TV 2021)
*† The Falcon and the Winter Soldier (TV 2021)
*† Shang-Chi and the Legend of the Ten Rings (2021)
† Eternals (2021)
*† What If...? (TV 2021-2024)
† Spider-Man: No Way Home (2021)
*† Loki (TV 2021-2023)
*† Hawkeye (TV 2021)
*† Doctor Strange in the Multiverse of Madness (2022)
*† Werewolf by Night (2022)
*† Moon Knight (TV 2022)
*† Thor: Love and Thunder (2022)
† Black Panther: Wakanda Forever (2022)
*† Ms. Marvel (TV 2022)
† She-Hulk: Attorney at Law (TV 2022)

Phase Five:
† Ant-Man and the Wasp: Quantumania (2023)
† Secret Invasion (TV 2023)
*† Guardians of the Galaxy Vol. 3 (2023)
*† The Marvels (2023)
*† Echo (TV 2024)
*† Deadpool & Wolverine (2024)
*† Agatha All Along (TV 2024)
*† Daredevil: Born Again (TV 2025-2026)
*† Captain America: Brave New World (2025)
*† Thunderbolts* (2025)
† Ironheart (TV 2025)
† Eyes of Wakanda (TV 2025)

Phase Six:
† The Fantastic Four: First Steps (2025)
Wonder Man (TV 2025)
Spider-Man: Brand New Day (2026)
Vision Quest (TV 2026)
Avengers: Doomsday (2026)
Avengers: Secret Wars (2027)