While slicing isnt a terrible choice due to the fact that you can aquire small quantitys of credits from nodes and send out missions for slicing components its not really the best choice if your only going to have one crew skill. The biggest draw for slicing atm is Advanced Neural Augmentors , but its a gamble without a mission item which are rare themselves and ussualy pricey.
In my opinion the best choices are one of the gathering skills. Archaeology , Bioanalysis and Scavanging materials fetch good money across the board and there are always large concentraited areas for each level bracket to farm.
Agree. If most F2P go slicing too, that market for Adv Neural Augmentors will come crashing down too.
If you are F2P, you need to stick to gathering skills.