To be very honest, the ultimate tip is avoid quantization, at all. Quantization is the opposite of real musical performance, and it's not surprising that you aren't happy with it. Anyway:
- it's hard to give you suggestion because it's really depending on the style and musical context: is it fast is it slow, is it rubato is it streight, is it classical/romantic or is t pop-rock? It will dictate the amount of quantization you may afford without getting trouble with the final effect.
- the usual source of issues with quantization of a live MIDI recorded performance is accents and position: the DAW MIDI editors usually give you flexibility on the amount of non-destructive quantization, and checking the velocities/position/duration of the MIDI sequence generated by your performance will provide you with important informations about the accent you want preserve (e.g. are you missing subtle rythmic accents and syncopation after quantization? etc.)
- if you are recording in real time controllers (e.g. CC2 and CC11 etc.) you may check if the controller track follows the notes after quantization: if the DAW moves postion of notes only, but doesn't affect the corresponding controllers track, then the expression of the notes will be inconsistent and will definitely produce different/unwanted effect etc.
IMPORTANT: a general tip to get help here: post a midi/audio example of what you want and what you get instead, so people can understand your request and give precise suggestions.