I'm currently a purple belt in taekwondo, and i'm thinking of switching to muay thai or kickboxing. should I?

i have taken a combo of taekwondo and karate and i like it a lot. I also took kickboxing and that is really fun also. I am a brown belt in karate and i think it went really well. But really its all up to you. What do you think you would be most likely to stay in for a long time. What do you think you would like the best!