Great movie as usual. Marvel understands more than anything, that these movies are supposed to be fun. They know it's ridiculous and they even joke about it...
Hawkeye's line about "I have a bow and arrow... none of this makes sense" is one of the funniest things I've ever heard. The movie is seriously bloated but they still make it work, which is really impressive. That's a hard feat to do and other movies have failed miserably when they pack it full of characters like this.
Cons
Pacing is so fast, there is so much going on and so many characters. Marvel usually develops things better.
Ultron literally goes from something nobody has ever heard of to being fully sentient and murdery in about 5 minutes. Wish they would've thought to tease him even the slightest in Iron Man 2/3 or Avengers 1.
Vision was weird to me, and also like Ultron, he just kind of appears and isn't developed very well. Honestly I could do without him, although I'm probably in the minority because the theater went nuts when he showed up. Him picking up the hammer was cool.
Pros
This movie is HILARIOUS. So many funny one liners and gags. Again this **** is so ridiculous, but treating it the way they do makes it work.
Chemistry of the characters is phenomenal. Thor, Cap and Stark work so well together. They all do really.
Ultron was a pretty good villain. Voice was better than I thought it would be, and damn he's snarky.
Hawkeye was great. Finally got his chance to shine and he killed it.
All in all, Marvel continues to reign supreme. I can only imagine just how big this universe is going to get with Civil War following in to Infinity Wars. Seriously, Civil War is going to be amazing. And I'm actually really looking forward to Thor 3. I like Thor, he's funny. Plus it means more Loki.
On to Ant-Man, which I'm now really excited about again. Still wish it would've been Edgar Wright, but I love Paul Rudd and the last time I thought Marvel had finally jumped the shark, we got GotG and we all know how that turned out.