depends on what your goals are and where your enjoyment lies.
If your goal is to become a good NLHE tournament player, there is not much reason to play partial table spin n goes or such reduced tables.
In such cases, you'd be far better off playing full-ring games.
I do think, however, that rather than play cash or MTT's that single table tournament is one of the best for getting a good variety of skills built.
In this format, you can play a full ring...but also experience the changes in the game that happen as the table gets smaller.
One of the problems with starting with MTTs is that you will get s disproportianal amount of early game experience with far less late game experience.
With a single table game, you get a more balanced experience.
For the MTT's, I'd suggest you stick to the
freerolls and make a rule that you will only allow a rebuy at the beginning (to give you a starting chip stack advantage) and an add-on to give you late game stack advantage...but that you do not rebuy otherwise. you should also either start at the very beginning of the tourney (so you can wait for good starting
hands)... or register just before rebuy period ends and try to hang on uyntil the add-on.
If your goal is to earn an income playing poker...then you are going to need to spend a ;lot of time on the micro cash games. Again...if you can play single table, I think you'll learn more about the whole of the game in all its phases.
I'd really advise against playing the 3 and 4 player games if your goal is to be good at poker. These games are not the same. You have to have a wider opening range and a wider calling range...which brings luck into play far more. You can learn some VERY bad habits playing these games which are not transferable to other formats.
All the best,
JT