Oooops, I keep forgetting there are many people who've only seen either the TV show or the movie series. I grew up with the movie series, then turned to the show later in life. Methos is the oldest immortal in the series at about 5000 years old. Pretty much everyone in the "Highlander" verse thinks that he's a myth, especially the Watchers who study the immortals. Lately, he's managed to stay in hiding by becoming a Watcher, under the guise of the mortal Adam Pierson. One thing I love about him is that the job he undertook as a Watcher was to do research on that mythical immortal Methos.
I also love his interesting combination of catlike arrogance and self- depreciating humor. (He frequently wanders into Duncan MacCloud's flat and pirates his stuff.) Oddly enough for being so old, he seems to take life much less seriously than so many others in the "Highlander" verse, so he usually winds up with the best lines. (While searching through MacCloud's CD collection, full of classical composers, he whines "Why don't you have any Queen?")
He also possesses one of the most interesting noses yet seen among mankind.
Back on topic, is having a fascination with interesting noses a guilty pleasure?