And it was a season that saw defences vastly improve from the year before, with 462 tries scored compared to the mammoth 651 in 2003/04, and an average of 4.2 tries per game.
The Early Winners
The Neath-Swansea Ospreys started the season in scintillating form, winning all of their first seven games and thumping the previous two years' winners, Munster and Llanelli Scarlets, in their opening two fixtures.
The Welsh side scored an impressive 173 points in their first five fixtures and swept aside Leinster in Round 7 to complete a hat-trick of scalps over former Celtic League champions.
Munster started another year slowly, losing two of their first three, with their third game a thrilling 27-27 draw against Connacht at Musgrave Park, before going on a ten-game winning streak.
The Scarlets started off their title defence in poor fashion; Gareth Jenkins' side only won two of their first five games, against Scottish sides Glasgow and Borders.
For the Borders, any chance of success looked impossible as they lost their first eight games on the spin, and the Scots would always be playing catch up.
Defending champions Scarlets endured a tough start to their campaign; here Connacht's James Downey leaves Gavin Thomas trailing?
Run-in
Having almost reached the halfway stage of the season top of the pile, the Ospreys stuttered during November and December as they lost two on the bounce - 10-9 to Connacht and 13-9 to title rivals Munster.
That kept the league interesting, but from the turn of the year the Welsh region would not lose another game.
That form meant Lyn Jones' side had the chance to win the Celtic League title with a game to go. Edinburgh were their opponents looking to spoil the party, but a hard fought 29-12 victory saw the Ospreys crowned champions in front of a home crowd at the Gnoll.
Welsh starlet Gavin Henson continued his great form, kicking five penalties, two conversions and surging through for a second-half try to seal the win.
Munster did make the Ospreys sweat; a 24-8 victory over the Dragons put the pressure on, with tries from Alan Quinlan, John Kelly, and Shaun Payne.
Leinster demolished Newport Gwent Dragons 55-3 at the end of January to keep their title hopes alive, and that result was the Irish province's biggest winning margin in the Celtic League to date, and the Dragons' worst defeat of their two-year existence.
Gavin Henson was impressing for Wales and in dazzling form for Ospreys
Final Day
With the league title decided, it was just the Heineken Cup places up for grabs on the final day of the season.
The Dragons helped out their bitter rivals by defeating Connacht 24-19, as the Cardiff Blues qualified for a play-off spot against an Italian side for a place to join Europe's elite thanks to a 33-12 win over the Borders. Two tries from Rhys Williams and all five conversions scored by Nick Macleod helped secure the win for the Blues.
The Dragons leapfrogged the Scarlets, who lost out to Ulster, into fourth spot thanks to a bonus-point win over Connacht, while Munster and Leinster beat Edinburgh and Glasgow to finish second and third respectively.
The Top Scorers
Then the darling of Welsh rugby, Henson's right boot scored him and the Ospreys 175 points to top the standings having finished second to legend Neil Jenkins the year before.
It was a great year for the 23-year-old, who also impressed hugely for his country during the Six Nations, but his total was 90 points less than his 265 the season beforehand.
Leinster's David Holwell was 17 points behind Henson in second place, with Charlie Hore and Dan Parks completing the top three - both finishing on 153 points. Gareth Bowen of the Scarlets was just one point behind in fifth spot on 152.
Newport Gwent Dragons' Kevin Morgan was leading try-scorer on 12 having moved from the disbanded Celtic Warriors.
And Ulster's Tommy Bowe, Munster's Christian Cullen and the Ospreys' Josh Spice all crossed the whitewash eight times, with Aisea Havili of the Scarlets scoring six times to finish fifth.
Kevin Morgan led the try-scoring charts with 12 during the season for Newport Gwent Dragons
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