More than recommended are the routes of Relja couple. On their page there are routes for all tastes and difficulties, more than enough. Can safely say it suffices for years of getting to know mountains and routes, as the couple are known as excellent connoisseurs of our walls. Truth be told walls that average climber never even heard of, but that's another story.
Anyway on their page routes are properly ranked and routes marked xxx and +++ are mostly suitable for all climbing enthusiasts, of course at each wall read possible warnings and tips that might be useful.
I've done many of their routes and can say they convinced me with their approach and especially beauty of routes.
Maybe some more walls that will convince every vertical lover: Staničev vrh, Veliki vrh, Zapotoški vrh, Jermanov turn, Kalška gora, Kalški greben, Jež, predostenje Grintavca, Veliki vrh, Nad Šitom Glava, south wall of Prisojnik, Goličica, Bovški Gamsovec, Veliki greben, Stador, Dolška škrbina, etc. For climbers who need conditions for titles and must avoid equipped routes I recommend: Osat in Nad kuhinjo špica, Konkubina in north wall of Grintavec, Beli pajčolan and Salamara, routes in Kuclj, etc.
Anyway they have routes for one or more alpine careers and interestingly in their routes you really enjoy.
Help yourself.
Good luck, Miha