Hum not many people answering...
I usually refrain from posting anything but the most obvious fact since i am not really that experienced as a player.
The only army i played so far is salamanders and i never attended any tournaments, the variety of opponents i faced so far are somewhat limited.
To be more precise those are
BA,
IG,
CSM,
SW,
DE and orks but i played the most game by far against
BA.
I tell you all this because it must have biased my opinion so now you will be able to put my advice in context...
As MFLETCH succintly summarized , a salamanders army is shining in close or mid range but to get there you will need mobility.
Drop pods are indeed a very good way to get there but after you land you will not have any mobility so an all pods army might struggle against very fast opponent.
Also half of your pods (round up) will come down on your first turn,the rest will follow soon after with 6 ed reserve rules so in a typical game by turn 3 everithing will have entered the field...
This mean that for the last turns of the game you would have a though time repositioning if need be.
If you use transports...well lets say that rhino chassis is not very durable and land raiders are expensive, so a distraction is in order to keep them alive.
It is also a good idea to bring some long range firepower (combat squadded tactical can do that to some extent) or at least mobile medium range firepower such as speeders or bikes.
I tend to build list with those elements
-Alpha strike/disruption :usually at least two pod so you have some flexibility, those would be anything from ironclads dreads ,combi sternguards, command squad...anything that hit hard and that the opponent can't ignore.
-assault/defense: those are the troops you need some to go capture some for your home objectives
-Reaction; those would be the medium range mobile firepower
Many units can fulfill many roles at the same time ,i think with the 6 ed bike troops are especially interesting altough maybe hard to fit in lower point list.
feel free to pm me if you want more specifics...
sorry for the long post, as there are no potatoes here is a sleeping ork