I like to walk around Temple Bar at the weekend. Temple Bar is sometimes criticised as just being a place for drunks and stag/hen parties, but that's really just Friday and Saturday nights; and even then, it's not a problem and the place is mostly very pleasant.
On Saturday I wandered through the Food Market and the Book Market. To be honest, the books are only worthwhile if you're a tourist needing a cheap read. The Food Market is very nice though. I was also impressed by the band playing on the square.
And the weather, wow! We've been so lucky.