Guild Wars 2

Played the game when it was first released haven’t played in a while though, starting to get back into it and I would like to play structured pvp primarily, my favorite class is theif right now but what are the best 2-3 classes I could possibly play and why? Thanks friends

Since I assume you are queuing solo, you want to start with warrior/ele/engineer. These are extremely versatile and fill multiple roles, making them ideal for soloq when you have no idea what team comp you’ll get. They are also faster to pick up than the likes of thief, which takes a fair amount of practice before you can be effective in soloq (can’t hold a point so you have to be sure you can be effective in other ways).

Thief is perfectly fine. They can carry SoloQ matches, and (like every other profession) are still played in a top team.

My recommendation:
Jump into every profession to see what they are capable of doing. Learn their skills and abilities and recognize where you got countered to maybe be able to apply that knowledge against them.
Choose ONE profession as your main, and try to get better. Practice – a lot!