believer

I'm a strong believer in freedom of speech, but I honestly don't care about the fate of Reddit.

I don't see how concepts enter into it (though contra Andrei Alexandrescu, I'm still a big believer in concepts).

It sounds like you are a believer that rights originate from society (government), which is something I would disagree with.

I'm a pretty big believer in justice and fairness and will fight for both if necessary.

I am an enthusiast of electric cars, passionate about ocean pollution, believer in locally based sustainability.

Alex Stepanov, who wrote the original STL, is very much a believer in fundamental indivisible building blocks like iterators and algorithms and careful API design.

I'm not a big believer in any economic theory, but I see supply-side drivers abound.

Your statement is no different than a horoscope believer's confirmation bias.

I'm a firm believer in your Right to be Offended, but you know what?

Back when I used to work with Sriram on Microsoft Popfly (now defunct) I was a huge believer in asking 'stupid' questions.

A hypothetical true-believer in the Flying Spaghetti Monster would (by most reasonable criteria) be moving in the right direction if he/she were to become a Christian instead.

I'm a firm believer that wearable smart devices will eventually go mainstream.

I'm a big believer in "if it ain't broke..." but also consider that a design should move with browser/web developments to, in an evolving way.