In what sense are you using the word plenty? Not in a relative sense, surely. The number of churches that teach a doctrine that could even be contorted into anything resembling this is going to be minuscule. Exceedingly liberally, you'll be under 1%. I actually wouldn't be surprised, given how strongly it is stated and restated in the New Testament, if there were an absolute zero of churches that teach that Christians are "good" and will be rewarded for being "good" in heaven, compared to non-believers who are bad.
From the Catholic Catechism:
'Jesus solemnly proclaims that he "will send his angels, and they will gather. . . all evil doers, and throw them into the furnace of fire", and that he will pronounce the condemnation: "Depart from me, you cursed, into the eternal fire!"'
Catechism of the Catholic Church - IntraText
From Thomas Aquinas:
"And since a place is assigned to souls in keeping with their reward or punishment, as soon as the soul is set free from the body it is either plunged into hell or soars to heaven..."
St. Thomas Aquinas: Summa Theologica - Christian Classics Ethereal Library
From the Bible:
""But as for the cowardly, the faithless, the detestable, as for murderers, the sexually immoral, sorcerers, idolaters, and all liars, their portion will be in the lake that burns with fire and sulfur, which is the second death.” Revelation 21:8
20 Top Bible Verses About Hell - Scripture Quotes
Hell houses are a thing this time of year:
Evangelical Hell Houses Are Waking Nightmares
There are the classic examples already brought up of Dante's Inferno and the various art pieces depicting people suffering in hell.
One way or another, it would seem that more than 1% of mainstream Christianity depicts hell as a place where suffering occurs due to the behavior of a person. Various descriptors of these people exist: wicked, unrepentant, evil, cursed "bad." Contrast with the descriptors for the heaven bound: repentant, blessed, forgiven, "good." "Good people go to heaven and bad people go to hell" is a simplistic way of describing the theology, but it does seem to follow from the way that (some) Christians very publicly proselytize about the threat of eternal punishment.
That's a non-sequitur. It does not follow, from the suffering of hell being the absence of God, that you love God only to avoid some punishment.
But it does follow that if a person loves god only to escape suffering, then they love god only to escape punishment.