I can't decide what to be!

[Claire_Pendragon]

Exactly you can become anything.

I want to be, a space ship ranger!

IMHO

Easy - Hard

DPS< TANK < HEALER

Imo, PLAYING a tank, is the easiest role.

But you're skill isnt what determines your performance.

Its far too easy for someone else to F up your role. (Then blame you.)

If you have friends, go tank. If you plan to play with strangers, go DPS.

Healer is dead easy until max level, but even then, its roughly on par with DPS difficulty at endgame.

DPS have a bazillion DoTs/debuffs/buffs to micro manage, while trying to dodge stuff, whilst a healer has HoTs/debuffs/buffs/HP to manage.

1 single mistake on a healer is more noticeable than 1 single mistake from 1 DPS.

(If all DPS make a mistake, its a wipe of the PT though.)

because DPS can be carried in easier content, try DPS. But once you get to the hardest content, dont expect DPS to stay be the easiest.