If he went to Cloud City and it happened to have Lando in it... that would be one thing. But he didn't. He went to Cloud City because it had Lando in it. The Falcon bit is a little convenient, but it doesn't hurt my feelings at all.

Luke & Leia... that is pretty offensively convenient even though it's always been a part of the story I've accepted.

Vader & C-3PO... now we're cooking with gas!

Vader & Greedo: Why??????

Chewie and Yoda: Oh, give it a rest already!

Darth Plagues teaching Darth Sidious how to create life with the Dark Side of the Force which is hinted that Sidious used to create Anakin since his mother thought it was a virgin birth, and then the whatsamacallit on the Queen of Naboo's ship crashes which brings the party to Mos Espa where a rogue jedi knight decides to cheat Watto out of his slave and bring him to Coruscant where he meets Sidious? Yeah, that works pretty well. Palpatine had it planned the whole time....