I'd recommend these;
They're like reincarnations/new world or isekai n' stuff so iz pretty cool
Isekai wa smartphone to tomo ni (mc's overpowered btw)
Re: Zero (dis ful die)
Drifters (dis nerd war)
Overlord (3rd season's on July; also has game genre)
Knight's & Magic (robots.. eugh, mc's smartass tho)
KonoSuba(though this anime is a joke (haha get it? coz its plot is lik-.. a. jok--.. k ill stop))
btw if you like zero to hero/something animes there's
DanMachi (dungeons, and adventures, and cute onee--san's)
Shakugan no Shana (magic(they call it existence), demons, mc's weak at first but he'll ge-... no spoilers)
Black Clover (Magic Knights,Shouting, Ongoing)
Kore wa Zombie desu ka? (Demons, Mc's a zombie, vampires, all the evil nerds from hell)
My Hero Academia (Heroes, MC's a nerd, but he strong)
Ao no Exorcist (demons, religion, oppai)
Tokyo Ghoul (yeah demons, um demons, mc was weak, "was")
Hunter x Hunter (Aura (nen), adventure, looking for his father, mc aint smart)
Bungou Stray Dogs (gangs and stuff, government, hidden powers)
Hundred (opponent's like an alien of some sort, mc a nerd but he strong)
Guilty Crown (sad, opponents are hoomans, weapons are called void which are taken from the person's heart)
Strike the Blood (vampires, mc'll get strong)
Tales of Zestiria X (adventure, shepperd, chosen one)
Sousei no Onmyouji (hell, parallel world, yin yang)
High School DxD (lmao)
and if you like overpowered mc's,um etoo..
Mob Psycho 100 (mc only gets stronger when he's pissed or similar to that)
Assasination Classroom (from the word itself)
Beelzebub (mc's a thug, a strong one, gets a baby, he then went to hell)
Code Geass (International wars, mc is smart af, robots)
The Seven Deadly Sins (mc likes the smell of panties, plot still developing)
Death Note (i dont get it)
One Punch Man (didn't expect that didya? *sarcasm face*)
for game genre
The King's Avatar (his hand's fast af, retired gamer)
Log Horizon (he was stuck in a game HAHA, well they want to get accustomed to the game)
Sword Art Online (the developer of the game trapped the 10,000 gamers who were playing)
No Game No Life (incest, totally incest, so the game god decided to abduct them, they now want to beat them in a game)
well, decent i guess.... (dunno d genre hehe)
Arslan Senki (WARSSSS!!!)
Shokugeki no Souma
Mahouka Kouko no Rettousei
Comet-Lucifer
ONE PIECEEEEE!
that's all I have hopefully I helped someone watch somethin'
ah by the way, have I already recommended Isekai wa Smartphone to tom--....