Though the Japanese aren't exactly known for their love affair with first-person shooters, Team Ico director Fumito Ueda can name at least one that he digs: Half-Life 2. Speaking to G4TV (through a translator), Ueda named the Valve-developed sequel when asked which games he has had an emotional reaction to.
"There was variation in terms [of] locations and also [in] the way of storytelling in the game. Usually, you have to incorporate storytelling with constraints, but the way [Valve] implemented constraints was something different that I enjoyed, compared to other games," observed Ueda. He's even considered making his own first-person game at some point, stating, "I have an interest in making first-person games."
If Ueda's previous development cycle lengths are any indication, we tentatively expect to see a Ueda-developed first-person game by 2025 or so ... at the earliest.