I really like Icepick, but since this shit is 100% up to personal preference, I'm not gonna push it much further than that. Well, except for mentioning that I like the unique sleek look, the fact that he's one of the few TFs that looks good in white for reasons other than being white in G1, and that you've got some pretty good posability in terms of silly action poses.
Also, the alt mode is actually pretty realistic in its own right, and getting a character who's almost named Professor Chaos is definitely a plus.
... I kinda like whirl or whatever the helicopter is, too.