From my own personal experience of doing Street Magic, the best type of Illusions to do are the type that can fit in the palm of your hand and use your hands as a makeshift table. Also other Illusions that are small enough to keep in your pockets, and if you happen to own a Pro Carrier, you can carry quite a bit more of a variety.
So things like certain card tricks that only utilizes you to either hand cards for the spectator to hold, I.E. Double Back, B-Wave, Queen and Ace Transpo.
Then there are other magic effects with coins/money that can easily handled by yourself or with the aid of the person you're doing the magic for.
And one last thing, you should also look into certain effects like:
1. Healed and Sealed
- this is another great effect you can carry around with you and set it up or however you want to present it.
2. Flow by Dan Hauss
- which just so happens to be my absolute favorite walk around magic illusion, even though I almost use it on a daily basis, it never gets old, and the reactions it gets will blow your mind.
3. Self Tying Shoelaces
- this illusion is perfect for walk around/street magic.
4. Mentalist Effects
- now I know that there are a lot of different types of Mentalist effects, but just check out the Mentalism section here on Penguin and you're bound to find something that will work for you.
There are a bunch more ideas that I have, but I'll just keep it short to 4 things. And at least they wont weigh you down at all either, really great tricks usually don't take up too much space when you're doing Street Magic... Or at least try to keep from being overwhelmed with how many magic tricks you should carry around with you.
And of course these are just my opinions, and what I've been using for the past couple of years and it has worked well for me so far, best of luck to you