If you're in your teens and 20s, an age gap of 10+yrs seems to be odd. But once you reach 35yo and up, a 5-15yr age gap is just right. This is just my pov.
Ang importante, magkasundo kayo ng wavelength. Ang nangyayari kasi, if the girl is still immature, tendency is ma-out of place lang sya when she joins his circle. Very awkward. Tapos kung bolero at manloloko pa ang guy (marami nyan), ang mangyayari is the girl will just be taken advantaged of, tapos iiwan nalang later. The other problem I see is if you are not of the same level of experience or maturity, the guy may find you boring outside of bed. So puedeng pang kama lang ang mas batang girl. Hindi naman lahat ganito pero sinasabi ko lang ang harsh reality. Maraming lalaki kasi bolero at nagpapanggap na single kahit hindi.
Kaya bago kayo ma inlove, maging makilatis. Kung biglang naglalahong parang bula o biglang susulpot at mawawala, I guarantee you, 95% chance, he is really busy... busy with other women in his life.
I only started dating when I turned 40yo (late bloomer). Yes gurang nako compared sa age ninyo.

But I've dated men that are in their late 30s, 40s and 50s. And there is one common denominator, if he is really into you, kahit pa 50yo na sya, he will text and call you unendlessly. Kahit pa gaano sya ka busy. That's a fact. Kahit pa immature na bata, he can also miss texting you at may ibang pinagkakaabalahan. Yung mga guys na nawawala wala at ayaw na tinatanong mo kung san sya galing at sa mga nawawala ng di mo ma explain, 95% chance may tinatago sila.
One thing I notticed though, divorced/separated men are more mature/patient in general. Once they're sincere, they are better in handling relationships, communicating their needs and making you feel more loved. Siguro dahil sa pinagdaanan nilang heartaches and disappointments. Kaya may advantage din ang older men.
One thing I also look for in them is if they are physically fit. Obviously, may sis nagsabi na mas shorter pa lifespan ng guys. It is important na health conscious sila for you 2 to enjoy more places together and kung magkatuluyan kayo, better sex life as well.
Kaya girls, just be open, di mo alam baka ang true love mo ay 5yrs up pala ang tanda sayo. But also maging makilatis and determine his sincerity before allowing yourself to fall hard.