Angel BEats is one of my fav animes of all time. only PlanetES, Cowboy Bebop, Tengen Toppa Gurenn Lagann and maybe Toradora! are equals ^^
Oh Gurren Lagann. How much mindfuckery can you get in a single series. Was brilliant though, even if it was a little cheesy at times. There were a couple of plot events in the first half that were a little disjointed and broke the rhythm of the series, but overall it was solid.
Watch it if you're game for a series that's got a whole lotta weird shit in it. You just have to watch the first "GIIIIGGGAAAA DRIIIIILLL BREAAAAAKEEEEERRR" to have your mind officially stop comprehending what's going on and just enjoy the animation in the background.
If you can't be assed to watch all 26 episodes though, there are 2 movies. 1 for each half of the series. The telling is slightly different, especially the end, but it all amounts to the same thing.