I've been playing a character in a long running campaign (2+ years) that consists of a relatively large number of players (approx. 6 regulars and another 2-3 semi-regulars). Due to the number of players, the GM introduced a player who is more or less the 'leader' of our party. This was mainly because in the beginning we would take a long time to come to a decision, so it fell to our 'leader' to sometimes make an executive decision on what to do next. This leader is seen more of a first amongst equals and has had his decisions challenged in-game on more than one occasion by other characters which has led to some nice role-playing.
Early on, I made the decision that my character would respect the authority of this leader and have been playing this way for a while. The problem now however is more related to me as a player instead of my character. The leader knows he can rely on me to take his orders (and follow them!), however this sometimes results in 'boring' gameplay for me as a character. For example, due to being a mage/bard, I am generally asked to stay behind/cover the rear when other 'sneakier' characters go on investigations or on cracking skull expeditions because I am 'reliable'. I am often overlooked unless some magical ability is required of me. My character has above average abilities in areas other than magic (rogue related mainly) - in fact, the only area where I cannot hold my own is melee combat.
The question is, how do I change this situation whilst still staying true to my character? Openly challenging the leader of the party would be seen as dramatic change to my characters behaviour.
We're playing in a homebrew version of Rolemaster FRP and MERP.