There is different kind of tracker on linux, if you want to use a desktoo/laptop.
For me there is tracker which has one sound engine at a time :
- chip sound : goatracker c64, adlib tracker (opl) ;
- defflemask ( maybe this one support multiple sound engine at a time or multiple instance, could be interesting to you )
- sampler : lgpt, impulse, etc...
- klystrack, chip sound related
and the other one which use multiple sound engine at the same time, but they are not chip related IMHO :
- sunvox, renoise, picoloop
you seem to say, you don't want to stick with only one kind of sound, so I think, sample tracker could be the way to go. Or maybe try defflemask which support different sound engine on the same interface. But I don't know if you can mix gb sound with megadrive for example. I have not use this one.
I think you need to discover using those tracker if you want to make sound "from a chip", or you want to use "kind of chip sound" from a sampler or synth engine.
Hope the best for you, find your way thru the jungle
EDIT :
I think I have not fully reply to your question. Each tracker as it's own way to make music. So for amiga like, IIRC, it is only sample, so you have to collect sample from everywhere from the internet or collect "mod" file which contain sample and parameter (instrument) connected to the sample. The "mod" file are really interesting as format because it is quite portable and you can dump instrument sometime ( depend on the tracker ).
There is tracker which is focus on keyboard also, and other which use keyboard and mouse, not the same feeling, I know I don't like to use mouse at all because I'm a linux command line nerds. For some people mouse is a bottleneck and it is maybe a reason they like tracker or hardware gears.
I think in my case I don't like sampler because you need ( as you seem to say ) to collect sample, it take times, and you don't make music. You collect sample and you will never have all the sample in the world, so be aware, that sampler take more time than synth engine. But the two are really important ( I use also sample but from hardware sampler, less distractive ). Or you can choose to use a big bank of sample and say I have enough let's make music.
And remeber one thing, make music for you not for every one, it will be the better way to enjoy what you produce