My personal favorite is Ike. He is almost broken in a 4 player match where you can sneak up behind people. Ike also excells in crushing cheap Metaknight players. Othere than that I like Luigi for the super uppercut, and Pit because he can't die. Captain Falcon was my favorite in Melee, but I just can't play him with all the nerfs.
As for the cheapest characters it would have to be Metaknight, Pit, and Toon link in my opinion. They all have various annoying abilities that are easily exploited with little skill.







