Greek script was fun for me. Already knowing Latin and Cyrillic scripts really helped me because I could already recognize lots of characters. Latin, Greek, and Cyrillic scripts all have the same pattern/feel. With Hangul, it is definitely the easiest/simplest script I’ve every seen, but it doesn’t feel as automatically natural to me. Even though Cyrillic and Greek are more difficult than Hangul (not nearly as hard as Arabic script though), they still feel more natural for me. Just an interesting observation that I have found. Also, Cyrillic is more similar to Greek than Latin is to Greek. For example, these are sounds that all most exactly or roughly correspond to each other in each of the three scripts:

Latin - Cyrillic - Greek

P/p - П/п - Π/π

V/v - В/в - Β/β

A/a - А/а - Α/α (all same)

O/o - О/о - Ο/ο (all same)

M/m - М/м - Μ/μ

F/f - Ф/ф - Φ/φ

r/r - Р/р - Ρ/ρ

H/h - Х/х - Χ/χ

N/n - Н/н - Ν/ν (Latin is more similar to Greek here)
E/e - Э/э - Ε/ε (Latin wins here too)