If you liked
High School DxD
|
...then you might like
Shinmai Maou no Testament
|
I'll preface by saying Shinmai Maou no Testament, while sharing some similarities with DxD, is in its own (arguably lower) league but I do like it and can wholeheartedly recommend it. DxD's standout character, Issei Hyoudou is amazing. I just love his character. Very cool. That's something I can say about Toujou Basara too. He's very refreshing a character and not your stereotype harem mc. He has a backbone and a personality. The harem is also top-notch. If you liked DxD, give this a try.
If you liked
Rosario to Vampire
|
...then you might like
High School DxD
|
I'll say this outright, I thoroughly enjoyed DxD. It had both a great plot and *plot*. Outstanding show 9.5/10. Now lets talk about Rosario + Vampire. It has a similar premise, but different. Our guy goes to a school as the only human amongst various supernatural beings; demons, vampires & werewolves to name a few. In my opinion, it has amazing *plot*. 10/10 in that department. It's actually story and progression (it has one) is not spectacular but enough to keep you interested. Would recommend.
If you liked
Tengen Toppa Gurren Lagann
|
...then you might like
Fairy Tail
|
I know what you're thinking. This is way too much of a stretch. Do hear me out. Despite the stark contrast in the genres, I do believe fans of either show can appreciate what the other has to offer. They both have gut-bustlingly funny moments. Their use of nakama and deus-ex machinas (imo) leave behind fond memories and feelings of wanting more. Can't go wrong with these two :)
If you liked
Nisekoi
|
...then you might like
5-toubun no Hanayome
|
Both are feel-good amazing shows of the harem archetype. I personally prefer QQ but you can't go wrong with these two. Must watch!