What you need to recognize is what the character class draws on for its inspiration. It's the not the apothecary, elixir brewer, or Miracle Max who makes stuff for other people to take. He's Doctor Jekyll/Mr. Hyde (or even Kraven the Hunter) - conducting weird experiments on himself and his own physiology. He fits in with that sort of alchemist pretty well, though he dabbles across archetype well enough as he gets more skilled.
We've only had one alchemist in my games so far, but this is exactly how he was played: madman injecting himself with all sorts of crazy mixtures. Sort of like the movie version of Herbert West, but experimenting on himself rather than corpses.
Lots of fun, but caused some problems stealing scenes when another player wanted to steal every scene. Alas.
Rob1207 said:
I just don't see how Alchemist (and to a lesser extent gunman) don't break peoples suspension of disbelief as much as 4e did... the part that drives me the most nuts is people who agreed with me to leave 4e are acting like I'm crazy for disliking the same type of thing in pathfinder
People, myself included, have provided a number of reasons why the alchemist doesn't break our suspension of disbelief. I, personally, find it far less problematic than other Vancian casters, particularly clerics. By extension, I find it far less problematic than martial dailies.
Now, if I sat down at your table and started harping on how stupid the cleric casting mechanic is and all the terrible things that implies about the world, you'd probably treat me like I was crazy. And, really, rightfully so. Who does that?
I'd suggest just accepting that "suspension of disbelief" is a vague and personal thing, not tied to a specific edition or playstyle, but more about individual things that get stuck in our eye and just won't come out. You can't make them understand why the alchemist is terrible, just as we can't make you understand that it's fine.
If it really bothers you that much, the only positive action I can suggest is asking the GM if they'd allow alchemists to have the infusion discovery for free. The alchemist player probably won't object and it allows them to work the way you think they should.
Cheers!
Kinak