For me personally I´ve never felt any depression or other related sides with deca. I have no experience with NPP though. Even with tren I don´t get any sides except for some insomnia maybe but nothing related to depression or anxiety or wrong kind of aggression. My last cycle was 800 mg test cyp, 400 mg deca for 16 weeks, felt great the whole time, getting good gains and horny as hell also the whole time. Also threw in 400 mg tren e for the last four weeks (I know it´s too short a time for long ester but anyways). I didn´t use any "real" AI on that cycle, only 25 mg proviron ed and nolva 10 mg ed, also cabaser 0,25 mg Mon, Thu. Also HCG 500 iu Mon, Thu.