Help me pick, sell me a profession.
Best solution is the most obvious – play what you like. Whatever pros or cons towards your named professions you may get in this thread now may or may not become mute the next patch.
Guard has been pretty buffed in recent patch and now they are all over PvP and whatever Revenants can do Guards will always remain solid pick for WvW, unless something really disasterous happens.
Necros are now considered by many a “Kings of the Mists”, as you may see many lfgs looking for “4necro\druid” compositions.
Mesmer as recent test shows again pulls the short end of the stick in terms of damage, but at the same time Chronomansers are still viable and welcome in raids as tanks and partybuffers.
Engie is still “Jack of all trades and a master of none” – all around a good profession, capable of doing everything, but in return for everything he does there is someone who does it better.
Ranger now is quite welcome in many gamemodes as long as you are willing to be Druid healer =/
As for Warriors, unless something drastic happens to them, they are set as PS partybuffers.
Personally, I like necro. I’ve found that by switching around weapons and traits, I can really bounce my necro into any game mode and take on different roles. But honestly, that may just be my familiarity with that profession compared to my other characters, so I very well may be biased.
And ultimately, the same advise I think everybody will include… play what you have fun with! Plus, what DarkMonk mentioned already, any given patch could completely change a profession and how desired they are in different game modes. There’s also talks of a new expansion coming at some point, and those could really flip everything on its head.
Druid would be the best bet