1) The skill level at micro stake level - up to 0.25/0.50 so far - is the same, regardless of stake level? The players just use a bit more money. It certainly seems like it so far. Which is tempting to step up a few levels.
2) Playing on 9 seat without seeing real people makes it very difficult to remember/track players' patterns/habits over time. I have been playing very very cautiously as an experiment today and always folding/checking after the flop if I have nothing and noone seems to pick up on it.