Think of 'Me gusta.... ' as 'pleases me' or please me', according to singularity or plurality of the following subject.
The use of the word can be tricky.
Gusto = taste, pleasure, honor,
Me gusta = I like
Me gusta comer. = I like to eat.
Me gusto'. = I liked it.
Les gusto'. = They liked it.
Me gusta'va = I used to like it.
Te gustari'a? = Would you like to?
Les gusta'ron los dulces? = Did you people like the candies?
Me gustara' = I will like it
Me estará' gustando. = I will be liking it
Les gustara' = They will like it.
Les estará gustando'. = They will be liking it.
Le gustara' = He or she will like it.
Le estara' gustando. = He or she will be liking it.
Les estara gustando = They will be liking it
Les estaban gustando = They were liking it
Le estaba gustando = He or she was liking or enjoying it.
Mucho gusto! = It is an honor! [After being introduced to someone.]
Me gustaria = I would like to....
Te gustaria? = Would you like to?
Les gustarian? = Would you folks like to?
Les gustó'. = They liked it.
Not all the above words carry the emphasis mark. I placed it for those who might need help in pronunciation.