As an occasional visitor to the island, I have never found the pubs too terrible (usually visited Douglas). The Cornerhouse is good for live music, as was the Rovers although who knows what will happen there with all the changes.
I know it gets a bad press but I always enjoyed Jaks. Decent pint (depending on what you drink of course), and usually a band playing.
The Prospect was decent enough, although anytime I was there it appeared to be on the quiet side.
Strand 58, when I first visited I thought was OK, but as a few years went by it seemed to get harder and harder to get served, usually because they had 2 staff on.
There is also an Irish pub on the Strand which annoyingly I can't remember the name of . Brennans? Again I found that an okay place.
Been in Outback, can't remember too much it was TT week and things are a bit hazy. Didn't like Colours, don't mind loud music but definitely don't like oven hot bottled beer. Miss The Venue had many a good night out there.
Maybe I am just easy pleased! And of course this is just my opinion as a visitor. I realise if you live on the island your view of these pubs may differ greatly!
I am back on the island TT week, any new suggestions of pubs would be appreciated.