i use MAL as a way to keep track of ongoing series/series i plan on watching. anything i've seen that i would view as below mediocre/'bad' is not listed (anything under 6/10). i also refrain from listing any series i've dropped - this is mostly done to keep things neat and organized, as i often share this list when recommending shows for others to watch. feel free to ask questions if you have them. [friend requests are fine, too]
6 - 7/10: decent. might not be appealing to everyone, but has aspects i find very special. usually pertains to more obscure/kids anime.
7 - 8/10: objectively good. depending on the genre i'd recommend it to most people.