Would suggest play all as you'll get a feel how the different heroes deck play style like and know how to deal with them when other players play against you. This is must do especially Arena where you are given random hero and cards to pick with. Also playing all heroes to level 10 net you free 100 gold as well as all the hero basic cards, so thats an incentive.

For Play mode which you build your own deck, pick hero(s) or deck style you like or best built with the limited cards you have. Your deck should 'flow' meaning all the cards come out easily each turn when and where you want it, and synergy where cards can combo off with each other. Good example I recommend is the hunter deck in the earlier thread. This part you have to focus due to your limited resources (cards and dust) to build the best few decks that suit your play style, in particular early on when you start building you library of cards.

Would suggest play all as you'll get a feel how the different heroes deck play style like and know how to deal with them when other players play against you. This is must do especially Arena where you are given random hero and cards to pick with. Also playing all heroes to level 10 net you free 100 gold as well as all the hero basic cards, so thats an incentive.

For Play mode which you build your own deck, pick hero(s) or deck style you like or best built with the limited cards you have. Your deck should 'flow' meaning all the cards come out easily each turn when and where you want it, and synergy where cards can combo off with each other. Good example I recommend is the hunter deck in the earlier thread. This part you have to focus due to your limited resources (cards and dust) to build the best few decks that suit your play style, in particular early on when you start building you library of cards.

I not guru la... just a lil more experienced and spending too much money/time on this type of hobby 

that we called guru who spend mass money investing and researching and experienced. community need guy like you take my compliment

agree
btw, u also spend some real money to buy packs?
or just keep doing daily quests to earn coin?

1 month 7 - 15 pack and all other thru daily.
i would spend gold on arena than expert packs.

in Arena you dont have to earn the card to be able to draft them, as the card are entirely random, you could choose legendary card without owning them if the draft is available to you ofcourse

and you earn rebate by wining more match on arena, means you spend 150 gold in arena you might get little rebate about 15 - 30 gold if win 1 match and a guaranteed expert pack for you. so, would you spend 100 for expert pack over arena match ? this question answered.

Just got Gelbin Mekkatorque. Seems quite... WEIRD?

I hate that card. Chances of screwing up is quite high.

I'd like to share this from one of the Hearthstone Tournament discussion.
In general, Hearthstone deck metagame falls into 4 archetypes:

AGGRO: Uses early to midgame minions and poses a threat by constantly beating down the opponent.

CONTROL: Use spells and abilities to deny board presence or the ability to apply pressure by dictating the pace of the game.

MIDRANGE: Mixes both AGGRO and CONTROL, using threatening minions and efficient spells.

COMBO: Usually relies on combining specific cards to deal lethal damage.

Keep in mind that some classes are more suited to specific archetypes more than the other.
Hopefully this will help those new to Hearthstone to be able to construct a deck with proper direction in mind, not [Insert ALL class cards here] deck nor [Insert ALL legendaries here] deck.

Think synergy and keep experimenting!

I hate that card. Chances of screwing up is quite high.