I only write in 1st person and on a couple of occasions, once I've got into the meat of a story, it slowly starts to dawn on me that 'I'm' not the protagonist of the story - or at least the secondary character is the more interesting. I'm not sure if this is a sign I should be writing in 3rd, and nor am I asking how to avoid it. What I'm asking is could it be done successfully? Has it been done successfully? Obviously the problem with this is that in a 1st person narrative, unless I was witness to everything that happened to my protagonist, I couldn't really tell his story. Nor do I know how they're feeling or what they're thinking. As an example I'll use the story from my future-set road novel. It deals with a secondary character (the narrator's best friend) who fell on hard times, got into debt with a nasty loan shark, and went on the run. As his best friend, the narrator goes with him, but do you see what I'm saying? So far all the trials and tribulations are centered around this secondary character. I didn't plan it that way, it just happened. I didn't even realise I'd written it like that until now. I'm not even sure this means my second character is the protagonist.