How much insurance coverage do you need and why?

What are your coverage levels? I'm up for renewal and need to shop around. However I'm unsure of how much insurance coverage I really need in California.

Searching the past threads shows 100k/300k/100k, 250k/500k/250k, and 50k/100k/50k. Deductibles are all over the place too, especially when it comes to glass replacement. What do you think are good coverage amounts and why? TIA.