I can agree with most of the above.
If you can't beat micro how do you expect beat low, mid level? Otherwise, there are certain tourneys what definitely have weaker field on low, mid levels compare to some micros. I agree, less bluffs on micro, less aggressive, basically everything what fundriver wrote, the game is more simplified, even like that the variance is a b*tch.
Playing on micros, and deciding from one day to another play higher level permanently have significant financial side, too. I don't share the common 100buyin bankroll bullsh*t. I think playing on low, mid level tourneys average field 500-1000 players, you need 200-400buyin, personally i think one of the main reason why players burn their bankroll on any level - even if they play perfect, what nobody does - because of they read, heard somewhere the 100BI 'rule' so even if they burnt it they stuck with that or leave.
Someone wrote above stupid things happens on higher level, too. I would say variance is a bigger b*tch how they advertise.
So even if you find good tourneys on higher levels, it is mostly a bankroll issue, of course you can play 1-2 and hope that will be your lucky tourney. (i think playing av. 10$ buyins, you need at least 3-4k, for 30$ av. buyins need 10-15k+, who has it from micro players where average buyin 2-3$ and not many care much about bm.)
Personally, I don't force to play on higher levels, there are micro sats for that purpose + in the last year was in last 2 tables on low, mid level tourneys (usually 1K+ regs) 30+ times, and i could reach FT only 1 time..... usually relegated some preflop allin 75-80% for me... how i wrote few times above the variance is a b*tch on all level