In my experience, neither style works perfectly on its own — but if I had to choose one for low and micro stakes, I'd lean towards a tight-aggressive (TAG) approach. at these stakes, many players are calling too much and not folding enough. This means elaborate bluffs and complex pressure plays often don't work as well, because your opponents simply don't respect aggression the way experienced players do.
At micro stakes, the most profitable strategy is usually straightforward — wait for strong hands, then bet and raise confidently. Let your opponents make the mistakes, and they will.
That said, being purely tight and passive is also a trap. If you only play premium hands but never apply pressure, you become predictable and easy to read. The sweet spot is being selective about the hands you play, but aggressive when you do play them.
As you move up in stakes and face more thinking players, you naturally need to add more aggression, wider ranges and better positional awareness to your game.
Bottom line: tight-aggressive wins at low stakes. Loose-aggressive wins at higher stakes — but only if your fundamentals are solid.