First read this.
Loraen's Class Selection Guide
Then assess your own level of determination. Do you know yourself well enough to determine if you can tough out the 60 grind? Maybe you know you're highest level has always been 44. Pick a class with level consideration in mind. 60 chanter and shaman dominate, for example.
SK and Monk bring different things to the table. SK can feign pull, even better at lvl 60, but are low on the DPS spectrum. Monk obviously king puller but not a great tank. With slow/torpor that my change... if you make it that far.
Otherwise, consider if you would rather do pickup groups or solo or both. You'll find that no matter which route you go, both will have their unique challenges. And just because a solo camp exists, doesn't mean its uncamped.
Good luck!