Warpiglet
Adventurer
Some just do and its great! As DM they should be encouraged in every way, especially if they build in a draw back to use as a hook for development and adventure.
But there are some who just do it strictly to exploit the rules in some way shape or form and will brook absolutely no other interpretation of anything that interferes with their PC. You ask them about their PC backstory and they say "Far Traveler so I can get Perception since its great for my PC." There is no art/drama ask to them, they don't even pay attention at the table when you are describing a scene to them, they don't really get the RPG aspect of the game. I have never liked that player and they will always cause problems at the table eventually.
But to each his own.
Fair enough. My preference is for a CHARACTER to have character and multiclassing or not is secondary. As for starting the thread and my arguments afterwards, I am actually in the camp of preferring minimal cheese and all of that.
However, I am not immune to some desire for power or ability. For example, i thought of playing a ranger/druid and really enjoying the ability to swing a big hammer while fighting alongside some conjured creatures.
Here, it just happens that I want to be able to fight. I guess there is some RP element to it--I was thinking of playing a former solider who no longer believes in fighting for honor and coin but rather survival and friends. BUT I did not want to do it with a scimitar or staff. Just preferred a big hammer. Seemed fun, 2d6 is nice, whatever.
There are many reasons to play an MC character that I think are valid and do not get in the way of immersion. I don't think it screams cheese or ridiculous even though I clearly want to swing martial weapons...
(then again, not optimized per se with many screaming about the risk of losing concentration and so forth with the druid spells...)...