I'd say people who recommend buying a console just for one game are mad!
Well, if you liked ES3:Morrowind then you may aswell play ES1:Arena and ES2
aggerfall. Ok, so they are nothing compared to the third, but since you love it you should try them.
Don't have much else to add, other than try out the BG series (and start on BG1, don't skip it because it rocks)
IWD might not be to your taste as it is very combat orientated, but still worth a look.