Okay lets get this out of the way.
I didn't enjoy it as much as the first, BUT its pretty damn good fun for the most part. I just felt the story wasn't as overall strong or compelling though I still laughed out aloud alot, but not as often . Saying that when DP2 does hit that funnybone its an extremely intense experience, infact I think the X Force scene is perhaps the funniest sequence I've seen since the spaceship in "Life of Brian". Its simply LOL brilliantly unexpected..
Its a VERY dark openning though (but I did like the James Bond style intro) and because of it some of the pathos is really uncomfortable to watch, but it rapidly picks up again once Deadpool gets recruited into the X men (trainee). There are quite a few revisions to the trailer, keep your eyes pealed for the many Easter eggs , sudden and VERY brief cameos and old new reintroductions.
Character wise I absolutely loved Domino and Cable, Brolin manages to leave Thanos in the right universe almost as soon as he appears. The only real objection I had overall was to Ryan in that he repeated a fair few of the first Deadpool jokes but super out grossed them ,which weakened it a tad for me from being a total A+++ , but some of the deeper emotional moments are surprisingly heartfelt. He REALLY does take the p*** out of the superhero genre way more than the first (and he is absolutely cooking with gas in this one) ,but the next movie really does need to let the X force characters get slightly more to do ( !!!!!!!!!!!!! ).
Well worth seeing in a crowd, great atmosphere again. Stay for the mid credits scenes (which you will need) because the ending is slightly abrupt (again), but they will help explain exactly why that is and are even more absolutely hilarious as a result ( but don't wait to the very end of credits, theres nothing to see after the mids).
PS:
Oh dear, for those that doubted I actually went to see the movie here is the proof that I did: DP2 got a very early release in the UK. I don't post spoilers because I got heavily criticised some years ago by people coming to a post release thread BEFORE they went to see the film. If you reread my post AFTER you've seen it you'll note I've hidden some.