The problem with flaming people who base their builds on those of other people is that no powers or slots are refundable. If you experiment you run the risk of wasting a power or slot choice. Knowing in advance what will and will not be advantageous is sensible not weak.
The point about xp locations and exploring the game is very true though. It was the same in Everquest. People will never try anything new because they already know the supposedly best places to do things/gain xp/get loot. It is probably a 50/50 split between who are too stupid to figure things out for themselves and those people who actually don't want to waste time in reaching their goals.
Anyway there's lots of good information in this thread it was worth a read
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