Alot of the PLHE games ive played in have players who just wont fold.... and im talking 3 or 4 to a table.
Crazy varience, but when you finally win a pot it can be HUGE.

Proper no foldem holdem.

In a tournament it probably wont be quite the same, or at least not after the first hour or so.

Postflop isnt alot different. Preflop you may not be able to raise as much as you want in early positions when not enough people have limped so you might need to limp/reraise a little. Other than that just cross your fingers and hope they dont suckout.