I thought many people here would like to try some difficult approaches. So here are some around Greece.

1. Mikonos (LGMK), rwy 16 (During August with strong NE winds if you want to add weather).
2. Skyros (LGSO), rwy 36 (no navaid) (winds as LGMK)
3. Samos (LGSM), rwy 09 (difficult to "Go Around" if needed)
4. Elefsis (LGEL), rwy 18

Also try the easier but still interesting airports of

1. Corfu (LGKR) (with runway on the constructed landfilled area over sea)
2. Ioannina (LGIO) (surrounded by mountains ecpecially north and east).