First, Leia on Hoth is arguably hotter than Slave Leia in Jedi. Granted, I live in Minnesota so my perspective on such matters might be skewed. Most guys don't find wool scarves & mittens sexy — I am not most guys. I'd love to get her alone in the South passage, if you know what I mean.1 I'm just saying that I'll take ski bunny Leia over steel bikini Leia any day.
The second thing I noticed is R2D2 goes every place people go (except inside Yoda's house) under his own power. He follows people around on multiple planets and space ships. He travels by rolling. Which means...
THE ENTIRE STAR WARS UNIVERSE IS WHEELCHAIR ACCESSIBLE!!!
Both the rebels and the Empire put ramps and elevators in every damn thing they built. Even the Death Star is easy for R2 to navigate. We never hear C3PO ask Han, "Excuse me, Captain Solo, would help me carry R2 down these stairs?" Han Solo doesn't have time to carry R2 anywhere! He'd probably shoot C3PO just for asking — which would have made the whole trilogy more watchable.
Oddly enough, we don't see anyone zipping around the background in a quasi-futuristic wheelchair. I suppose they have medical regenerative technology that makes wheelchairs obsolete. It worked for Vader...
1. If you know what I mean, you are a geek. And I'm a scruffy looking nerf herder.
2. Get your mind out of the gutter.