Best was given a deal at the Millers in November after failing to find a club since his summer release by Blackburn, but endured three months of frustration.
He was sent off in his debut at Leeds and then suffered a double hernia injury which kept him out until the end of last month.
The 29-year-old has been feeling his way back to full fitness, scoring three goals in the last two games.
They have proved fairly crucial, earning a point in the crazy come-from-behind draw against Derby and then sealing the 1-0 win at Ipswich last weekend, but Best has got the thirst for more and reckons it's the best way to thank the Millers.
"I want to thank the club for giving
me a chance," he said. "I signed in November and it had been a hard time.
"I'd played with
Newcastle in the Premier League, scoring goals, and then it had gone to no one
wanting you and saying you're this and that.
"I've been way up there, very high, and then I was really low.
"But those
goals have reminded me what it's about. There's no better way to pay the club
back than score goals.
"I want a lot more now. That feeling when you score is an
unbelievable feeling. I'll be hungry to score a lot more."
As big an impact as Best has made over the last couple of weeks - and it has been significant in taking pressure off Jonson Clarke-Harris - boss Neil Warnock says it will not be until next season before he is firing on all cylinders.
"Leon won’t be 100 per
cent until pre-season," the Millers boss said. "He has to work through the summer. He has had a bad
double hernia. His stomach is still not in the best of condition.
"He needs to
do a lot of building-up work in the summer to give himself a chance. But I
think he is getting sharper.
"I saw that at Sheffield Wednesday when he came on.
I thought, ‘Wow’. The same against Derby, their centre-halves didn’t have a
chance with him."
