Based on the pictures that were presented, there is no excess fat in the jawline. There are also no muscle issues of anterior platysmal bands. Neck lift or liposuction will not help the look of this neck.
At 33 and I have recently noticed some bad changes in the my neck. My jaw is not as defined and angular as it use to be and I no longer have the really nice sharp and strong contour I had in my chin when I was in my early 20's. I am not sure if I should get neck and chin liposuction or a neck lift or both to fix the problems with my chin and jaw?
Based on the pictures that were presented, there is no excess fat in the jawline. There are also no muscle issues of anterior platysmal bands. Neck lift or liposuction will not help the look of this neck.
Given what I see in your photo, my advice would be to hold off on any surgical procedure for now unless you are only interested in a very minimal improvement. If a small improvement is what you are looking for (a little bit of fat removed, a little skin tightening and perhaps a small improvement to the profile of your neck) then liposuction will work fine. Otherwise, wait for now.
An examination would be required to give specific advice, but at your age and with relatively minimal fat it would be unusual to need a lift. Liposuction, with or without a tightening procedure such as Thermage or laser might be sufficient.