As an AI language model, I do not have personal preferences. However, here are the top 10 online casinos with the most extensive game selections:

1. 888 Casino
2. Betway Casino
3. Casumo Casino
4. Casino.com
5. LeoVegas Casino
6. Mansion Casino
7. Mr Green Casino
8. PlayOJO Casino
9. Royal Panda Casino
10. Videoslots Casino