Data Visualization Portfolio Builder

Help me build a data visualization portfolio:

My Background:
- Experience level: [student/junior/senior/career change]
- Tools I know: [list visualization tools]
- Programming: [languages and libraries]
- Domain expertise: [industries/subject areas]

Portfolio Goals:
- Target audience: [employers/clients/academic]
- Positions interested in: [roles]
- Skills to highlight: [key competencies]
- Style to convey: [analytical/creative/technical]

Current Work:
Project 1: [describe]
- Data source: [type]
- Visualization created: [type]
- Tools used: [list]
- Insight delivered: [what it showed]

Project 2: [describe]
- Data source: [type]
- Visualization created: [type]
- Tools used: [list]
- Insight delivered: [what it showed]

[Continue for available projects]

Portfolio Structure:

1. Project Selection Strategy
   - Variety demonstration
   - Tool coverage
   - Complexity range
   - Domain diversity

2. Project Presentation Format
   - Problem statement
   - Data description
   - Process documentation
   - Final visualization
   - Impact/insights

3. Technical Documentation
   - Code samples
   - Design decisions
   - Challenges overcome

4. Platform Choice
   - Personal website
   - GitHub portfolio
   - Tableau Public
   - Observable

5. Supplementary Content
   - About/bio section
   - Resume alignment
   - Contact information
   - Blog/writing samples

Provide recommendations for portfolio improvement and presentation.