What's some of the best ways a player could get his character killed?
Ok, maybe that's still a bit vague, here's my reasoning. I've played with new groups a few times, and lots of the GM's I've played with didn't want the characters to die, so threw things that were challenging, but not necessarily a sure-thing of death. And at the same time, playing with a new group and new GM can lead to making a character that doesn't fit as well as it did when it was being conceptualized.
Take for instance my current group.
I originally wanted to play a mage. When I proposed this, I was told that there was already a guy working on building a shaman. (Now, granted, the GM didn't actually say No to me making a magician.) Being new to the group, not knowing the GM or players, I quietly nodded and made a non-magical character with a latent-awakening quality hoping for the option to open up in the future. After characters were all presented and we sat down to play, I found out that no one had adhered to any form on "who's filling what role" and we ended up with some very strange character designs, and limitations on who-played-what were not enacted or enforced. So I guess the whole 'No' was something I perceived.
As we've played, I've realized that the shaman is extremely new to the game and has very little knowledge and as a result about 70% of what a magician can do, isn't done. I'm sure they'll get better as rules are learned, and the 4th ed Cancer-causing-game is beat senselessly out of their mentalities, but as a result, I'm still not playing the character I wanted.
I've tried to politely suggest options that would include remaking my character in the designs I wanted (first time being the night of the first game), but I was told no, don't worry about it, everyone will get their roles worked out and everything will get better as we play. Now this leads me to believe that the GM's view is that I am currently playing the character I want to play, but I'm trying to sacrifice to fill holes left vacant by other roles, since the table doesn't yet have an uber-well rounded team, and he's telling me I don't have to sacrifice what I want to cater to what's needed.
He's got it backwards.

Again, I'm still new to the group and the GM and don't want to come across as someone who's trying to retcon after finding out what is tactically better for his table, or to munchkinize my character into something more uber. So I haven't been flat-out about it all yet.
While the game is only a few weeks into it, I was kinda thinking... If I died, I'd lose the karma gained, but I'd be able to play what I want.

So how can I die easily, without it looking obvious, and not rock the boat for fear of not knowing how rough the waters are?
Are there any glaring munchkin ways to get killed by the GM and have it look purely natural? Or any creative ways to do the same?
If nothing else, it should make for a very interesting read.