It's interesting that in the middle brachos of Shmoneh Esrei, some brachos have both elements of praise and request and some only have requests. Ata Chonen has both, but Hashivenu has only request. S'lach Na has both, but T'ka B'shofar has only request. And so on.
No idea what that's about. Do the brachos that have both have something in common that the others don't?
