Yes, the loss of spontaneity aspect of T1 diabetes is a big downside for me. However, as
@tim2000s says insulin, carbs, bg meter and you're good to go. I normally carry them with me so I sometimes just do it anyway!
I also find it difficult explaining it to people. It should be straightforward - in simple terms the pancreas stops producing the hormone insulin and I therefore need insulin injections for the rest of my life. Leads to the inevitable questions - what's a hormone, what's insulin? The problem also is that it doesn't even scratch the surface of blood tests, hypos, complications, food etc, etc. In reality it is a very complex and hidden condition. If an asthmatic starts wheezing everyone can recognise that and they give themselves a puff from an inhaler. If a diabetic has a hypo most people around them wouldn't have a clue what was going on and even those who do know aren't always sure what to do. I'm 47 now and if I mention I'm diabetic to someone I don't know they say oh I expected you to be fat and it's caused by lifestyle isn't it? Arghh, I've had T1 for 29 years - I've never been fat and it's an autoimmune disease unrelated to lifestyle.
Without wanting to belittle the fantastic support our wives, husbands, partners and friends give us it's true that only another diabetic really knows what we have to go through.
As for things I like about it, erm.....err......erm....no, well I can't really think of any but I try not to let it bother me and just carry on and for the sake of myself and my daughters try and stay healthy and happy.