The 33-year-old has notched a career-best 16-goal tally – with one game still to play – for the current campaign after calling time on his five-year sojourn in England and returning to his hometown club to lead the line.
The Buddies are still in with a chance of posting a best-ever SPL finish of either seventh or eighth place should they beat Aberdeen on Saturday at Pittodrie and have already claimed two cup quarter-final placings.
All of which has left Thommo a satisfied man ahead of Saturday's swansong in the North East.
The Saints top scorer said: "I have to admit I feel like coming back to St Mirren has really rejuvenated my career and rekindled my appetite for the game. There is nothing better than coming back to your home town club, the side you have always wanted to play for and then also making a contribution.
"To be looking back at the season and have scored 16 goals is something that gives me a lot of satisfaction, but even more so given these goals have been scored for my boyhood team. But I think what has particularly pleased me has been the quality of football we have played.
"Obviously we missed out on the top-six place that was our stated target at the beginning of the season, but we go to Aberdeen with a chance to claim either seventh or eighth place which would be our best-ever SPL finish. On top of that, we made the quarter-finals of both Scottish and Communities Cups.
"I don't think anyone can argue that is not significant progress on what has gone before. I am pleased to have played my part in all of it."
While his ability to cajole more out of those around him – particularly Nigel Hasselbaink – by leading from the front, has been another huge plus for Saints gaffer Danny Lennon.
With strike Buddie Hasselbaink still to pen a new deal at Saints, his frontline mentor has urged the diminutive Dutchman to sign on for another campaign.
Thommo said: "At times Nigel has been unplayable. I have seen the look in opposition defenders' eyes when he gets the head down and drives at them and he has that burst of pace and ability to beat a man that is increasingly rare in the game.
"But at 21 Nigel is still a work in progress and I have no doubt in saying that he could do with another year at St Mirren. He is only going to learn from working under the gaffer and Tommy Craig, and he should be in no rush to move on."