As far as positive impressions, test and deca. Always a pleasant experience with that combo. Never had any issues with gyno or sexual side effects. Just straight mass and roundness. Go to cycle is 750 test and 500 deca. Can run that for months. Negatives? Equipoise. Never saw anything from it at all. Also tren. Never had bad side affects, but also never saw any of the huge gains others rave about. Just not worth the money. Now Masteron for me does all the things tren supposedly do for other people. I like that one a lot.. I generally spend two thirds of the year on test/deca and the summer third on test/mast.
Also I will pass on any of the common bulking orals-DBol and Anadrol.