First time steroid user well i am 20 turning 21 in june, i wouldnt pick deca over test as both have their advantages and i haven't used any of them. but as a first injectable cycle it is common to go with test e or test c, both are very similar long esters that give good results. as above i would be doing tbol only for my first cycle in june. but for second cycle i will be doing tbol + test e. read this, it will explain the differences in esters. http://www.uk-muscle.co.uk/steroid-t...explained.html also if you check out steroid profiles it will give you a clearer understanding and more of the stuff you read will make sense.