Japanese is harder/easier than other languages in what ways?

I want something to say when my other language-learning friends talk about how hard/easy XYZ language is.

For example, for easy parts:

• No genders
• Easy vowels/consonants

For difficulties:

• Kanji
• Formality

Please help? Thanks!

Edit: summary of comments for my future reference:

Easier:

• no genders
• resource rich for learning
• simpler tenses

Easy and hard:

• pronunciation (consistent, but accent hard to eliminate)
• grammar (consistent but different)

Harder:

• Kanji (like icons)
• formality