Personally, I don't take this game seriously. I play support 50% of the time and jungle another 30%. When I jungle, I take the tracker's knife and keep my yellow trinket to keep areas warded that the support can't afford to do. Essentially I am a roaming support that likes to attack lanes that are pushed to our towers (Yasuo is my fave). My play style is the same, regardless of which role I get in Blind Pick. I'm looking for opportunities to help someone carry. When Top, I will roam Mid and vice versa.
Well, except ADC. That's pretty much hope they ignore me so I can take a tower. Or feed. 26% Win Rate with that role.
In the end, my victory condition relies on having someone on my team that can carry harder than anyone on theirs.