The only machine I've even walked away from mid game was ST TNG. I have made many attempts to "give it a go", but I just dislike the machine. It has to be a "trekkie" thing as the game is just boring. Very hard to keep it working properly with its crap ruleset.
IJ gets a special mention - An absolute borefest !
Both ST TNG and IJ are severely overrated.
I USED to thing Gunners was as well - But I've really "warmed" to it lately. Good machine.
I don't "Hate" any particular machine, but ST TNG and IJ are the most overrated machines..