どっち

どっち is the casual form of どちら, used to ask "which one" (of two) or "which way."

KO-SO-A-DO SERIES:

• こっち: this way / this one (near speaker)
• そっち: that way / that one (near listener)
• あっち: over there / that one (far from both)
• どっち: which way / which one (question)

FORMALITY:

• どっち: casual (used with friends, family)
• どちら: polite (used in formal situations, with strangers)

COMMON PATTERNS:

• どっちがいい？: Which one is better?
• どっちでもいい: Either is fine.
• どっちにする？: Which will you choose?
• どっちかというと: if I had to choose / rather

NOTE:
Used for choosing between two options. For three or more, use どれ (casual) or どれか.