Wonderful suggestion. Watching replays will also show you the flow of a game of DotA. Taught me alot about timing and when to push, gank, etc.

A friend of mine that got me into dota and lets me use his spare cdkeys always plays IH games and has been sending me the replays of chars that I am interested in like Pudge, Zeus, Riki, Techies etc

I actually watched one game where before the creeps even spawned the other team had killed Rosh at lvl 1, but allowed 1 member to get the exp so 1 guy was lvl 6 or something as soon as the game started lol. Was quite funny

LVL1 rosh rush is a blast, my friends and I did that for an entire weekend. Everyone is lvl3 after rosh and then we would steamroll the closest opposing player. Half the time someone would quit out right after rosh was killed.