[quote=@UmbreonRogue]
Why do people like Overwatch?  I feel I should like it since it's a team-based FPS like Team Fortress 2, but I just don't get it.
[/quote]

[quote=@Dynamo Frokane]
Its basically team fortress for younger gamers who never discovered team fortress. So they treat it as something original and fresh. The cutesy but mild lite-erotic character designs allow cynical older gamers who have underdeveloped sex lives and an unhealthy obsession with irony to find things to 'gush' and also viciously argue about online.
[/quote]

I mean, that could be one way to look at it, but there are a ton of people who have played TF2 and love Overwatch as something unique from TF2. Also, I would probably suggest that passive aggressive explanations that insult those who care about the item in question do not actually help explain very well.

The basic structure of TF2 is not unique. No one thinks that it is. It differs from TF2 in several ways. 1) TF2 allowed hyper-customization and pay-to-win strategies. When you're up against an enemy player, you don't know what their abilities are unless you know what items they carry. Overwatch removes this hyper-customization. Any Ana player has exactly the same abilities as another Ana character. Why is this a bonus? Because the game goes to one's skill and game knowledge instead of the items they carry and how long they've been playing.  

2) TF2 has a handful of characters with many playstyle choices. Overwatch has many characters with relatively limited playstyle choices within the same character (but has nearly every playstyle covered). This goes back to #1. If you're playing against a Reinhardt, you know that you need to burn down his barrier and about how long it will take. If you're playing against a Pharah, you know that there are places she can't reach you and who best counters her. Sure, TF2 has similar strategies, but it's much more explicit in Overwatch (and there are still plenty of nuances to be found).

3) Overwatch has structure. TF2 tends to turn into a cluster with dozens of unused game mods that no one cares about. TF2 also has probably the worst tutorial system I have seen in a game. Overwatch's isn't exactly amazing, but you at least know how to play and where to find stuff. 

In short, Overwatch took what made TF2 great and refined it. Sure, there are cutesy characters, and sure, plenty of people treat them as waifus. But that is not why most people love the game. People love it due to the polish and care that Blizzard has put into the game, and the fact that it's really fun. Nearly every playstyle is well-represented, and even if you suck at shooters, there are heroes you can excel at.