General playstyles per character doesnt really work. Its per matchup.
I play DK, Lucario, Ryu, Ike, Dedede, Wario, Bowser, and Pacman about equally. I dont play a single one the same way regardless of who im facing because it doesnt ever work that way.
Usually its DK so i'll use him as an example. When im facing a medium/slow speed opponent im aggressive as hell, charging right into your face with UpB/jab combos/tilts/throwspams. I dont do that against faster characters like Sonic/Shiek because they can easily just sidestep me/grab before my first punch is even out. Against them i turn very defensive because they can bait/punish me way too easy if i play aggressive.
Flipside, i DONT do this with Ryu. Further emphasizing my point that its matchup based, not character based for playstyles.