SMT games can come across as really challenging, they have a lot of systems that dont appear in other rps and take some time to get used to, negotiating, fusing etc.
They are really good though! try the ps2 titles if you have the chance.
Rpgs like what you want though
Breath Of Fire 3 (PSP or PS1)
Final Fantasy 8 (The Best One

PS1, PC, PSP)
Ni No Kuni (ps3)
Lufia 1+2 (Snes)
Star Ocean Series (Snes, Ps1, Psp, Ps2, Ps3)
Tales Of Series (Snes, Ps1, Ps2, Ps3)
And while a little different if you like RPGs try Nier, It left me feeling like not many other rpgs have.