The Getaway: Random rewards, so not a good competition game. La Grange sounds like a Casio keyboard.
Rocky and Bullwinkle: Random rewards, top lanes are obscured by a ramp, plastic apron.
Centaur: Multiball and the magnet have no real point. Too easy unless you install Oliver's home ROMs.
Paragon: Needs to be 7-digit (but I'll get to that).
Silverball Mania: One trick pony (nail the donut). Mine's 7-digit already.
Pinball Pool: Too easy with remote drop targets (I'll get to that too).
Hot Hand: Perpetual extra ball on kicker once you light it, Joker is super hard to attain (good) but game can be beat like a dog without it (bad).
Six Million Dollar Man: Scoring speed is limited by sound effects (with switch 8 and 32 on, nail a spinner and note the sluggish score and light response.)
Skateball: Haven't played yet, don't know.
Big Game: Same as above but I do notice the SB-300 sound board doesn't sound as good as Ballys of the same period. It sounds like everything's a square-wave (similar to but not as bad as Atari 2600.)