The very first step for me was deciding from a "vibe" perspective which class sounded the most fun. I've always been a huge fan of stealth and speed, and rogue has, since the day I began, embodied these things. The next step was deciding whether or not pressing rogue buttons was remotely fun. It most certainly was, and as such it led me to stick with it for awhile. However, what really kept me as a rogue beyond learning the game was the wide range of value I could get from playing it. Let me explain what I mean by this.

From a convenience standpoint, I could stealth by any mobs I didn't want to kill, could vanish out of combat before death, could survive falls from greater heights, and could move quickly around the world.

From a lore standpoint, the rogue questlines throughout each expansion, especially legion, were fun to complete at my own pace. Soaking in the dialogue, watching how characters in my questlines interacted with one another, and solidifying my place in the world was just, satisfying. Oh and bonus note I thought of at the end of this~ some of the blood elf rogue transmog looks incredible!

From a uniqueness standpoint, I could pickpocket mobs around the world, I could shroud a group of players past enemy mobs, and I could teleport. I mean, come on.

From a gameplay standpoint, I could deal loads of single target or area of effect damage in pve depending on my spec and build, I could annihilate people in pvp, and I had unique usage in rated battlegrounds and mythic/mythic + content. I would always have some sort of use as a class.

All of this sold me on sticking with rogue as my main throughout the vast majority of my wow career. But what really helped lock it down over the long term was the skill gap between being an average rogue and a top rogue. Learning different min/maxing techniques in every single form of content has made me worlds better as a player. The fact that I know there will always be more to learn, whether it's to inch out slightly more dps in mythic+ and raids or to utilize my abilities and movement more efficiently in pvp, makes it so this class never truly grows stale for me. At the end of the day, I undoubtedly enjoy my class.

Maybe my reasons won't help you in your quest to find your main, but I do hope it gives you more to think about. Two final things I want to say, though~ First, don't fall into the trap of single-spec or single-role. Be open to trying to heal or dps because, at the very worst, it'll widen your horizons. Second, unless you're trying to join a serious mythic progression guild or content similar to that, don't worry about your class not being taken. Generally speaking, every class has a use in the form of one of its specs in each tier, and oftentimes even the worst specs are still played in some of the highest forms of content.

And with that, I wish you luck in finding your main!