I like both classes, both are very powerful and useful in both PvE and PvP. As Utaku said, they are not so popular within the community, but the community is as usual dumb. You cannot go wrong with either class, it is more about what you prefer.
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I'm looking for something that can survive, good dps, and very useful in game with other players.
The Paragon is the team player of the two. Extreme survivability due to high armor and shield, very good dps (unless you focus on chanting like Caruso nonstop hehe), Spears inherently do more dps than bows, spears, axes and swords (14-27, 1.5 seconds and extremely good attack speed buffs on top of that) could do and "Go for the Eyes", "Aggressive Refrain" and "Focused Anger" give you energy and adrenaline like there is no tomorrow.
Some just cannot stand guys in skirts. In this case, make a female one, which are lovely Amazons indeed. For male Paragons, I almost suggest you make a bald one if you want to use Elonian Armor (your hair often goes straight through the high collar, very annoying), which is cheap but very nice to behold. Eye of the North seems to bring a lot more armors for Paragons and Dervishes, nice ones, too.
My only legendary survivor, that is my Paragon. For a reason. Safe midline position and "There is Nothing to Fear" makes your whole party strong and resilient. I suggest you get "Watch Yourself", "For Great Justice" and "Shields Up" from your secondary profession.
You will also like that many of the Norn PvE skills seem to be shouts.
The only thing you should know when you play a Paragon is that people badmouth them despite their amazing abilities. This is a miracle.
BTW: I suggest you start out as Command Paragon if you do not want to unlock too many skills by Faction or use Elite Tomes early on.