My ultimate goal has been to move to Signal, but Signal being quite slow in the development and the infrastructure fronts, it's not a viable option for mass adoption right now.
For all its cryptographic weaknesses, I find Telegram to be a better choice. Message delivery is super fast. It syncs messages across devices. It's available on popular smartphone and tablet OSes and also on the major desktop OSes. It's also available on the browser (need phone to activate it for use, whereas in the other cases one single activation will hold good almost forever). Telegram has been adding new features (some of them are probably catch ups with WhatsApp) at a good pace.
My wishlist for Telegram is two fold - a) make the crypto better (or try to work with Signal and adapt that) and b) introduce a monetization plan so I can support the app financially for all the worth it has provided and keeps providing.