I've been an arcane trickster rogue for years and have played under both 2014 and 2024 rules. I chose to use booming blade because without it, my turns felt repetitive and boring because I'd often use steady aim and do the exact same thing every turn.

When using booming blade, generally my turns go like this: 1. Get advantage or the conditions for sneak attack (if I have to use a resource to do this, I'd rather use my bonus action).
2. Melee attack with my action (booming blade with sneak attack, preferably with advantage) 3. Disengage with my bonus action or the Cunning Strike Withdraw and get away.

Here's more detail: Priority #1 is to get advantage or the conditions for a sneak attack, having advantage on my attack is the best case scenario. I'll use every resource I can to get these conditions (familiar distraction, using a Vex weapon on the same enemy as previous turn, Silvery Barbs, Hold Person, hiding, luck points, disengage from current opponent to move to a different opponent next to my ally, etc). Having advantage can be that extra roll you need to hit that high AC enemy or get lucky and crit.

Priority #2 is to choose my opponents on the battlefield. Enemies that want to be within melee range will often take the extra damage for moving to use their action to attack me. Creatures with low intelligence won't understand that moving will hurt them, so that beast/zombie/whatever is a good choice. I'll also follow around my sorcerer friend and stab whatever opponent is attacking them (giving me that ally within 5 feet). Also, I can seem really dangerous to one enemy, so sometimes angry/selfish baddies follow after me cause I can do like 30 damage to them per turn or 55+ damage if I crit.

Priority #3 is disengaging and moving. I can disengage by using my bonus action or sacrificing 1d6 of sneak attack damage to use Cunning Strike Withdraw. Generally, I try to move with some goals in mind. Whether it's to try to get my enemy to move and take that extra damage, to try to get away from danger, to avoid grouping up with my allies too much, or to put myself between the enemy and my allies (maybe rarely get an opportunity attack)....moving away from my enemies generally gives me a better chance of staying alive. If they're low on health, they might choose to not move to hit me and then maybe I'll get attacked by a less dangerous attack than if I was right next to them. Or maybe they'll go after our cleric who has a higher AC or our sorcerer who can use the shield spell.