You make it sound like I need a new hobby - which I might haha.
> Do you consider nuclear energy sustainable?
Low-carbon, yes. Sustainable, yes. Renewable, not until we productionize extraction of uranium from seawater. [1]
> ... but do you believe nuclear, either fission or fusion, will play a large role in the future?
Fusion if we can crack it, totally. Seems like a clear winner. Fission probably will if there's some political will behind it, but not unless there's a change in sentiment.
[1] https://www.forbes.com/sites/jamesconca/2016/03/24/is-nuclea...