which Islamic attributes or characteristics are vital to make a common man an ideal Muslim

There are many characteristics that make a person an ideal Muslim. Here are a few directly from the Quran:
“Those who offer their Salaah (prayers) with all solemnity and full submissiveness. And those who turn away from Laghw (dirty, false, evil vein talk, falsehood and all that Allah has forbidden).
And those who pay Zakaat.
And those who guard their chastity (i.e. private parts from illegal sexual acts). Except from their wives or (slaves) that their right hands possess, for them, they are free from blame.
But whoever seeks beyond that, those are the transgressors.
Those who are faithfully true to their amanat (all the duties which Allah has ordained, honesty, moral responsibility and trusts) and to their covenants.
And those who strictly guard their five compulsory congregational Salawat (prayer) (at their fixed hours).
These are indeed the inheritors who shall inherit the firdaus (paradise). They shall dwell therein forever.”