Although I wasn't one of the close voters, your question is asking for a recommendation, which most of our user base feels shouldn't be allowed in any shape or form. Although I'm not going to go into all the details on why this is the case, the main reason is that they fall under bad subjective, which means there can be no one right answer, and it's just people posting "I like X best" answers with no backing.
As for your specific question, I think in it's current wording it would be Not Constructive. The reason for this is because you haven't given any criteria for why you like Day9, just "I like Day9, suggest something similiar." This is very similiar to a game recommendation question, which are off-topic here due to being purely subjective.
With that said, I believe your question may salvageable, although I'm sure some of user base is going to disagree (some users hate recommendation in any shape or form, no exceptions). If you can include more detail in your answer about exactly what you're looking for, and why, then I believe your question can cross over the line from bad subjective to good subjective *(which means subjective questions where answers are still supported by facts)*.
I'm not saying that will fix the problem, but it might. The reason I think it might is due to the fact that I think what you're looking for is a resource which will help you become a better player, and expanding your understanding of the game, something Day9 does very well with Starcraft 2. Although it may be borderline, I feel as if this crosses the line into a practical problem which can be solved, and crosses the line into good subjective. Furthermore, I feel as if such a question would be extremely useful to any new LoL player, and not just you.
I'd like to end by once against stating this might fix your question, it's not a guarantee.