I know this question maybe have been ask before but I need experienced player help. It been weeks of testing all the classes and im down to 3 that is Nova, Guardian and believe or not Tamer. Why them? I enjoy the awakening form of the classes and yes some have they high and lows but still cant decide for a main. Heres my pro and cons.
Guardian
Pros - Faster mobility, nice AoE and good HP recovery
Cons - Still feels slow and sometimes keep switching back to normal so have to keep pressing C

Nova
Pros - Stupid fast mobility, the gravity is kinda cool and very good grinder
Cons - Not a really good survivalist, I so like 3 so far in game so maybe a not used class?

Tamer
Pros - Fast, cute and have a pet
Cons - Pretty complicated to master, not very needed.

I forgot to add im not seeking being a top pvper since I mostly dont care the PVP part. 

At least you narrowed it down to 3. Over 3 years later and I'm still stuck between 5+.

I been on that road too. 

Ok, I decide not to go with Tamer so now is Nova or Guardian. Im more into the Nova side a bit but dont know. 

If the only problem with Guardian is the switching to pre awake you could lock the skill that switches you. And then put the pre awakening skills on your hotbar in case you wanna use the mobility skills.

Guardian is pretty much the best starter class and it is deliberately slow paced. You need to do fewer APM because all her skills hit like a truck.

Nova is the strongest from the 3 atm.

I would take guardian because she is the easiest of the three to learn. Good life steal makes it very difficult to die in PvE, low apm but hits really hard, and in PvP she has a full super armor rotation, which will help you a lot vs classes that have no grab. Later you can tag another class if you would be bored of her.

Ok I go Nova. While Guardian is easier to learn I found it boring and slow.

Nova is probably the only real female class out of this 3

Yeah I also tought about making a Nova second waifu, but a min height Tamer in maid outfit/kibelius is kinda cute too.