to me a sweet bike would be one that i can ride for four times a day for 15 mins+1 lap without getting armpump, but that is more technique and conditioning.
things i like in a bike are good turning- that little rm of mine will cut under anything- however, as a beginner rider, a loose feeling front end that feels like it will wash out in corners really slows me down confidence wise- i think thats why begginers do better on 4 strokes since they seem to press the front down for nice grip.
the shock doenst bother me as long as its soft enough- for the forks, constant frustration since i always feel i could get them working better and that would help me with prolem number 1!