That's a bit of a tricky question to answer, because in the end it's very subjective. Even a lot of the widely loved shows, like Kuuga and W from Rider or Shinkenger from Sentai, aren't universally liked by everyone in the fandom. The same is true the other way around, since shows like Kiva and Go-Busters still very much have their fans (I'm a huge Kiva fan, for example).
So just trusting someone else's word on what show you will or won't like isn't always a good idea. You can take their opinions into account, sure, but you won't know exactly what shows you'll become a huge fan of and which you'll turn off in disgust until you sit down and watch them. That's my two cents, anyway.