re: Poker & Playing the Tables vs Playing Multi Table Tournament
If you're grinding out a few bucks in freerolls then losing it in ring games, presumably at micro-stakes, it doesn't mean a whole lot. You can't lose money in freerolls, so it's more important to look at win rate.
As for what to play, play whatever you enjoy. If you get to where the difference in expected value
is large enough to factor into your decision process, cool. But while you're playing on a small BR, have fun. Your game probably needs work in general before fine-tuning questions such as MTT vs SNG vs ring start to increase more sharply in importance.